CONFERENCE PROGRAM
September 26 -30, 2016, Chengdu, China
International Conference on Optical and Photonic
Engineering
(ICOPEN 2016)
Tibet Hotel Chengdu|成都西藏酒店
No.10, North Renmin Road, Chengdu, China|成都人民北路一段 10 号
Mr. Tan Gang| Tel. +86-1398-2229-918| tatatangang@126.com
http://www.tibethotelchengdu.cn/index.html
Co-organized by
Supported by
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On behalf of the Optics and Photonics Society of Singapore (OPSS) and IACSIT and the organizing
committee of the fourth international conference on Optical and Photonic Engineering (icOPEN2015),
a warm welcome to Chengdu for the new and past participants. This is the first time this conference
has been organized outside Singapore and since there is an OPSS section in China, this was the
obvious choice. We look forward to having this event every other year in China and hope for your
support in this endeavor.
Optical and Photonic Engineering which uses principles of optics and technologies from photonics to
develop systems and instruments for industries ranging from Consumer Optics, Multimedia to
Precision Instrumentation to Laser 3D Printing and Processing to Biomedical Optics. Optical
Engineers or Optineers usually have multiple skills in areas such as optics, instrumentation, product
design and instrumentation, mechatronics and computation.
At the icOPEN2016, we have four keynote speakers who will give talks on Optical Metrology
Challenges, Optical tools for augmented reality; Optical Fibers and Applications and Image
Processing. Besides this we have plenary speakers from around the world to talk on Nanoimprint
lithography, Nanofabrication of large optical elements, High Precision Interferometers, CGH for
Optical Testing, Computational Optical Metrology; Computational Microscopy, 3D Inspection;
Physical to Digital Worlds using 3D Imaging tools, Remote Sensor, Optics in Agriculture and beam
control and power scaling in diode laser. A truly diverse range of topics which exemplifies the topics
touched by Optical and Laser Engineering. In addition our next generation of researchers have put
together a student poster event and short presentation would be made by them on their posters. I
would urge members to support the hard work of these students and guide them along in their work.
Finally, I acknowledge the support of all the co-organizers and supporting organization which have
made this event truly far reaching and exciting.
I hope you have an exciting yet productive icOPEN2016 and enjoy the sights and flavours of
Chengdu.
Anand Asundi
Chair, OPSS
Chair, Organizing Committee
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International Advisory Boards
Dr.Xie Huimin,Tsinghua University,China
Dr.Dario Ambrosini,University of L'Aquila, Department of Energetics,Italy
Dr.Manuel Costa,University of Minho,Portugal
Dr.John McBride,University of Southampton, United Kindom
Dr.Lo Yu-Lung,National Cheng Kung University (NCKU),Taiwan
Dr.Sarun Sumriddetchkajorn,NECTEC,Thailand
Dr.Zhao Chunyu,Arizona Optical Metrology LLC,United States
Dr.Peng Xiang,Shenzhen University,China
Dr.Ralf Bergmann,BIAS - Bremer Institut für angewandte Strahltechnik GmbH,Germany
Honorary Chairs
Prof. Jin Guo Fan,Tsinghua University,China
Prof. WU Xiaoping,University of Science and Technology of China
Prof. Liu Weiguo,Xian Technological University,China
Confernce Chairs
Prof. Anand Krishna Asundi, School of Mechanical & Aerospace Engineering, Nanyang Technological
University, Singapore
Prof Pan Wei, Southwest Jiaotong University, China
Prof. Qi Qiu, UESTC, China
Program Chairs
Dr.Ingrid Dewolf, IMEC,Belgium
Dr.Gao Wei, Tohoku University, Japan
Dr.Theodore V. Vorburger, National Institute of Standards and Technology, United States
Dr.Fengzhou Fang,Tianjin University ,China
Dr.Seung-Woo Kim,KAIST,Korea
Organizing Committees
Dr.Edwin Ma,WaveLab Scientific Pte. Ltd, Singapore
Dr.Fu Yu,Nanyang Technological University, Singapore
Dr.Jenny Zhu,Wavelength Technology Pte. Ltd,Singapore
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Steering Committee Chairs
Prof.Qian Kemao,Nanyang Technological University, Singapore
Dr.Zhang Yilei,Nanyang Technological University, Singapore
Local Chair
Prof. Xian Yu Su, Sichuan University, China
Prof. Qican Zhang, Sichuan University, China
International Publicity Co-chairs
Dr.Fernando Mendoza Santoyo,CIO,Mexico
Dr.Yang Lianxiang,Oakland University,USA
Dr.James Wyant,Optical Sciences Centre, Arizona,USA
Dr.Yu Yingjie,Shanghai University,China
Dr.Hillar Aben,IOC,Estonia
Dr.Malgorzata Kujawinska,Warsaw University of Technology,Poland
Dr.Pramod Rastogi,Ecole polytechnique fédérale de Lausanne,Switzerland
Dr.Peter De Groot,Zygo,USA
Dr. Leslie L. Deck,Zygo,USA
Dr.David Payne,University of Southampton,UK
Prof.Yukitoshi Otani,Center of Optical Research and Education (CORE),Utsonomiya University,Japan
Dr.Jiang Zhenyu,South China University of Technology,China
Dr.Wan Yongjian,Institute of Optics and Electronics, Chinese Academy of Sciences,China
Dr.Percival F. Almoro, National Institute of Physics, University of the Philippines,Philippines
Dr.Zuo Chao, Naning University of Science and Technology,China
Dr.Qian Chen,Naning University of Science and Technology,China
Dr.Henri Uranus,University of Pelita Harapan, Indonesia
Dr.Tan Ching Seong,Multimedia University,Malaysia
Dr.Qinghua Wang,National Institute of Advanced Industrial Science and Technology,Japan
Prof.Hamid Dalir, Department of Mechanical and Aerospace Engineering, Syracuse University, USA.
Dr.Saijal Kizhakke Kodakkattu,Government Engineering College Kozhikode, India
Dr.Şener Karabulut,Hacettepe University, Turkey
Dr.Abdus Samad,Indian Institute of Technology , Madras, India
Dr.Shariq Neshat Akhtar, University of Leeds, UK
Prof. Zhou Xin, Sichuan University, China
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Conference will be held at Tibet Hotel Chengdu. Address: No.10, North Renmin Road, Chengdu,
China
Beijing Time
The Weather Situation of Chengdu in September
Average daily minimum temperature
Average daily highest temperature
16℃
24℃
Currency
RMB(￥)
Best Time To Visit
Locals will tell you the best time to visit Chengdu is in the spring and Autumn, when temperatures are
temperate and the scenery is stunning. Various activities, Chunxi Road, Jinli, Kuanzai Alley, Dupu
Temple, Sichuan Opera, Hot pot and so on, are excellent to visit. The rainy season starts around early
September, Warmly suggest you bring your umbrella for your visit.
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Oral Presentations
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Timing: a maximum of 15 minutes total, including speaking time and discussion. Please make
sure your presentation is well timed. Please keep in mind that the program is full and that the
speaker after you would like their allocated time available to them.
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You can use CD or USB flash drive (memory stick), make sure you scanned viruses in your own
computer. Each speaker is required to meet her / his session chair in the corresponding session
rooms 10 minutes before the session starts and copy the slide file (PPT or PDF) to the computer.
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It is suggested that you email a copy of your presentation to your personal in box as a backup. If
for some reason the files can’t be accessed from your flash drive, you will be able to download
them to the computer from your email.
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Please note that each session room will be equipped with a LCD projector, screen, point device,
microphone, and a laptop with general presentation software such as Microsoft Power Point and
Adobe Reader. Please make sure that your files are compatible and readable with our operation
system by using commonly used fronts and symbols. If you plan to use your own computer,
please try the connection and make sure it works before your presentation.

Movies: If your Power Point files contain movies please make sure that they are well formatted
and connected to the main files.
Poster Presentations
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Maximum poster size is 36 inches wide by 48 inches high (3ft.x4ft.)
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Posters are required to be condensed and attractive. The characters should be large enough so
that they are visible from 1 meter apart.
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Please note that during your poster session, the author should stay by your poster paper to
explain and discuss your paper with visiting delegates.
Dress code

Please wearing formal clothes or national characteristics of clothing
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Prof. Dr. Wolfgang Osten
University of Stuttgart, ITO,Germany
Prof. Wolfgang Osten received the MSc/Diploma in Physics from the Friedrich-Schiller-University Jena in 1979. From 1979 to
1984 he was a member of the Institute of Mechanics in Berlin working in the field of experimental stress analysis and optical
metrology. In 1983 he received the PhD degree from the Martin-Luther-University Halle-Wittenberg for his thesis in the field
of holographic interferometry. From 1984 to 1991 he was employed at the Central Institute of Cybernetics and Information
Processes ZKI in Berlin making investigations in digital image processing and computer vision. Between 1988 and 1991 he
was heading the Institute for Digital Image Processing at the ZKI. In 1991 he joined the Bremen Institute of Applied Beam
Technology (BIAS) to establish and to direct the Department Optical 3D-Metrology till 2002. Since September 2002 he has
been a full professor at the University of Stuttgart and director of the Institute for Applied Optics. From 2006 till 2010 he
was the vice rector for research and technology transfer of the Stuttgart University where he is currently an elected
member of the university council. His research work is focused on new concepts for industrial inspection and metrology by
combining modern principles of optical metrology, sensor technology and image processing. Special attention is directed to
the development of resolution enhanced technologies for the investigation of micro and nano structures.
“Optical metrology in the conflict between desire and reality: Challenges and Solving
Strategies”
Abstract: In the context of measurement technology, optical methods have a number of unique features.
To them belong in particular the non-contact and high speed interaction with the object under test, the
largely free scalability of the dimension of the probing tool, the high resolution of the data, the diversity of
information channels in the light field, and the flexible adaptability of the comparative standard. On the
other hand we are confronted with non-negligible drawbacks. Here one should mention especially the
indirect nature of the measurement. This fact is the origin of a number of serious consequences which
make it often difficult for the practitioner to decide for optical metrology. Furthermore should not be
neglected that optical principles show high sensibility to harsh environmental conditions. As a
consequence, the transition from the laboratory to the industrial environment is often an adventure.
However, one of the biggest challenges that currently attracts high attention both in the technical and life
sciences, is dedicated to the goal of exceeding the physical limits of resolution. Nowadays people prefer to
talk about super-resolution, although that term generates an expectation that reduces itself in many
cases simply to the approach to the diffraction limit or to a more or less skilful impulse response design.
Not to forget are those negative consequences that arise from the high information density in optical
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signals. The nature of light and its fascinating interaction with matter, which made our visual sense on the
one hand to the most valuable information carrier, hinders on the other hand often the metrologically
correct interpretation of the results. Nevertheless, it can be proven by numerous examples that no
alternative to optical principles exists – especially if extended surfaces have to be investigated with high
spatial and temporal resolution. In particular, the implementation of the 6-sigma standard presupposes an
inspection coverage which is hardly to ensure by conventional measures. Because critical structures are
getting smaller and functional surfaces are becoming increasingly complex, the wavelength of light
provides the most flexible and traceable standard to cope with these challenges. However, the potential
that is inherent in the optical methods, seduces too often to overload the wish list or to make unrealistic
promises. Therefore, this lecture is dedicated to the tension between desire and reality in optical
measuring techniques. By using examples from the inspection of tiny semiconductor structures, from the
non-destructive testing of various materials and the measurement of complex functional surfaces we will
try to objectify this conflict and to explore strategies to face the current challenge.
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Prof. Motoharu Fujigaki
Human and Artificial Intelligent Systems, Graduate School of
Engineering, University of Fukui, Japan
Prof. Motoharu Fujigaki received his BE and ME degrees in mechanical engineering from Osaka University in 1990 and 1992,
respectively. He received his doctoral degree from Osaka University in 2001. He was working in NABCO Ltd. from 1992 to
1995. He moved to Department of Opto-Mechatronics, Faculty of Systems Engineering, Wakayama University in 1995 as a
research associate. He became an associate professor in 2003. He moved to Human and Artificial Intelligent Systems,
Graduate School of Engineering, University of Fukui as a full professor in 2015. He is interested in optical metrology using
image processing, especially 3D shape measurement using gating projection method, deformation measurement using
phase analysis method used for structural health monitoring and small displacement and strain distribution measurement
using laser interferometry. He is a chairperson of the Whole-Space Measurement and Inspection Consortium, an executive
board member of The Japanese Society for Experimental Mechanics (JSEM), and a steering committee member of Asian
Society of Experimental Mechanics (ASEM).
“Application of Sampling Moire Method and Phase Analysis Method to Structural Health
Monitoring of Infrastructures”
Abstract: Large structures require the development of a non-contact deformation measurement method.
The deformation measurement can be applied to predict landslides and for health monitoring of large
structures, such as bridges, steel towers, or tall buildings. A sampling moire method proposed by authors
is one of a deformation measurement method of a large structure such as a building and a bridge. The
accuracy of phase difference analysis is from 1/100 to 1/1000 of the grating pitches. This method can
analyze two-dimensional phases from a two-dimensional grating image attached on the surface of a
specimen. Authors also proposed a phase analysis method to measure the deformation of bridges from
parallel lines image using a Fourier transform. In this paper, the applications of the sampling moire
method and the phase analysis method to structural health monitoring of infrastructures are shown.
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Prof. Byoungho Lee
School of Electrical and Computer Engineering, Seoul National
University, Korea.
Prof. Byoungho Lee received the Ph.D. degree in electrical engineering and computer science from the University of
California at Berkeley, Berkeley, CA, USA, in 1993. In 1994, he joined the Faculty of the School of Electrical and Computer
Engineering, Seoul National University, Seoul, Korea, where he is currently serving as the Head. He has been on the Board
of Directors of the Optical Society of America (OSA) and the Chair of the MES Council of OSA. He is currently on the editorial
board of the journals Light: Science & Applications and Applied Physics B. His group has published more than 360
international journal papers and more than 650 international conference papers, including more than 120 invited
presentations. His current research interests include 3D displays and diffractive optics for nanostructures and
metamaterials. Prof. Lee is a Fellow of the SPIE, OSA and IEEE. Also, he is a Member of the Korean Academy of Science and
Technology.
“Optical tools for augmented reality”
Abstract: Augmented reality (AR) is a technology to integrate digital information with real-world
environment. AR is regarded as a next-generation display technology and service platform with the
advances in computer science and optical engineering. Indeed, wearable or head-mounted displays (HMD)
with AR have drawn a lot of public attention. Here, we introduce optical tools to realize displays with AR.
In particular, my talk will focus on implementation of see-through three-dimensional (3D) displays that
can be applied to AR. First, a see-through 3D display using chromatic half-mirror array (CHMA) will be
described. Fabrication process, principle, and a prototype of CHMA will be explained. Second, realization
of AR systems using holographic optical elements (HOEs) will be introduced. HOEs are transparent
elements that transform a specific incident wavefront to a predefined wavefront. HOEs have various
advantages such as angular selectivity and ability of spatial and wavelength multiplexing as well as
transparency. Our recent work that combines compressive light field display and HOE will also be
explained.
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Prof. Perry Shum
School of EEE, Nanyang Technological University, Singapore
Prof Shum received his PhD degree in Electronic and Electrical Engineering from the University of Birmingham, UK, in 1995.
In 1999, he joined the School of Electrical and Electronic Engineering, NTU. Since 2014, he has been appointed as the
Director of Centre for Optical Fibre Technology and was the chair, committee member and international advisor of many
international conferences. He was also the founding member of IEEE Photonics Society Singapore Chapter (formerly IEEE
LEOS). He is currently the chairman of OSA Singapore Chapter. Prof Shum has published more than 500 journal and
conference papers with his research interests being in the areas of speciality fibres and fibre-based devices. His H-index is
30. In recent few years, his publications have been cited about 500 times per year.
“Optical Fibre-Based Technologies and Their Applications”
Abstract: Optical fiber-based devices have been widely deployed in recent years. There are many
advantages of using fiber as a sensor. These include electrically-passive operation, light weight, immunity
to radio frequency interference and electromagnetic interference, high sensitivity, compact size, corrosion
resistance, easily multiplexing and potentially low cost. Several novel fiber-based sensors and
technologies developed are presented here, including fiber Bragg grating (FBG) based sensors, photonic
crystal fiber (PCF) based sensors, specialty fiber-based sensors and distributed fiber sensing systems.
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Prof. Dr. Ralf B. Bergmann
BIAS - Bremer Institut für angewandte Strahltechnik GmbH,
Bremen, Germany
Ralf B. Bergmann obtained his doctoral degree in Physics in 1991 at the University of Stuttgart. He worked at the
Fraunhofer-Institute for Solar Energy Research in Freiburg, the Max-Planck-Institute for Solid State Research in Stuttgart,
the University of Stuttgart, the University of New South Wales in Sydney, Australia and headed the Department of Applied
Physics at the corporate research center of the Robert Bosch Corp. near Stuttgart and the quality assurance lab of the
business unit Automotive Electronics at the same company in Reutlingen, also in Germany. Since July 2008 he is a professor
at the University of Bremen in the Faculty of Physics and Electrical Engineering and director at the Institute of Applied Beam
Technology (BIAS) in Bremen, Germany. His activities are centered on optical metrology and optoelectronic systems and
cover shape measurement, non-destructive testing, optoelectronic systems including micro and nano-optics and optical
design and simulation.
“Computational optical metrology”
Abstract: Optical metrology has developed into a key enabler for essential areas of industrial production
and quality control. Steadily rising demands on products and processes e.g. product miniaturization,
increase of precision, complexity and reliability require fast, precise, non-destructive and contactless test
and measurement processes, which can in many cases best be realized using optical approaches.
A great challenge for metrology systems arises from the combination of requirements such as high
measurement speed, low measurement uncertainty and tolerance with respect to adverse measurement
conditions. The later may stem from mechanical vibrations, uncooperative surfaces or an adverse surface
topology. To give an example: Measuring a surface profile with an area of 1 square cm at intervals of 1
micro meter per second in the presence of vibrations that causes the optics of the measurement system
to be accelerated with 1 g at 10 Hz and having the requirement to keep the shape deviation of the
products below 0.5 micro meter requires to capture 100 million data points per second with a maximum
measurement uncertainty of 50 nm at a maximum vibration amplitude of about 2 mm at 10 Hz. If, in
addition, the object has a surface topography that does not allow a complete observation from one
position, several light sources or several optical systems may be necessary to capture the light required to
determine the complete shape of the object under investigation.
Meeting these challenges requires novel approaches for optical metrology systems. In order to highlight
the need for a synergetic treatment of the capture of optical information and its computational treatment
to enable optical metrology under challenging conditions, we introduce the concept of Computational
Optical Metrology.
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Prof. Xie Huimin
Dept of Eng. Mechanics ,Tsinghua University,China
Prof. Huimin Xie Received Ph. D in Tsinghua University, China in 1992. He is a full professor and the deputy head of Key Lab
of Applied Mechanics of Ministry of Education of China in Tsinghua University. His research areas are in development of new
techniques and applications in solving challenging fundamental and industrial problems in the fields of experimental solid
mechanics and applied optics. He was the chairman of the Chinese Society for Experimental Mechanics (2007-2011), the
steering committee member of the ACEM (Asian Society of Experimental Mechanics), associate editor for the journal of
Optics and Lasers in Engineering (Elsevier Science, UK), associate Technical Editors for the journal of Experimental
Mechanics (Springer, Germany), editorial board member of Strain (Blackwell Publishing, UK), The Journal of Strain Analysis
for Engineering Design (Sage, USA). He undertook several important research projects including the National Science Fund
for Distinguished Young Scholars, key research project of NSFC，integrated project of major research program (NSFC),
project from the Program for New Century Excellent Talents in University. And he has published more than ninety scientific
papers in academic journals.
“Moirégrating fabrication techniques based on the nanoimprint lithography and
applications”
ABSTRACT: The moirétechnique is a powerful approach for deformation measurement. As a deformation
sensor for moiréexperiment, grating is crucial for a successful measurement. In this study, several
fabrication techniques for moirégrating based on the nanoimprint lithography (NIL) are reported to
prepare high frequency gratings on various specimens. Four derivative methods of NIL, including thermal
nanoimprint lithography (T-NIL), ultra violet nanoimprint lithography (UV-NIL), solvent-assisted
micro-contact molding (SAMIM), and solute-solvent separation soft lithography (3S soft lithography), are
selected to fabricate both the transfer gratings and zero-thickness gratings on surfaces of different
materials with frequency up to several thousand lines per millimeter. In this study, the hybrid NIL stamps
are designed to match the specimen surface and measurement methods. And the NIL processes are also
improved to satisfy the particular requirements of moiré grating. In addition, a multi-scale grating
characterization method is developed, which can be used for examining the grating lateral distortion and
locating the defects rapidly. In order to demonstrate the feasibility, versatility and reliability of the
fabricated gratings, several typical applications are exhibited, including the measurements of mechanical
parameters, residual stress, crack tip opening displacement, and thermal expansion mismatch of
electronic packaging.
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Prof. Manuel Costa
University of Minho,Portugal
Prof. Manuel F. M. Costa hold a PhD degree in Science (Physics) from the University of Minho (Portugal) where he works
since 1985 at its Physics Department teaching and performing applied research in optical metrology, applied optics,
nanoscience and science education and literacy. Presented over three hundred communications in international meetings
and published around the same number of scientific papers, monographs and books. Editor or member of the editorial
board of several scientific and educational international journals. Chairperson on eighteen international conferences.
Member of the Scientific Advisory Board of EOS, of the Board of the Iberoamerican Optics Network, and of the Board of
Stakeholders of PHOTONICS’21. President of the Hands-on Science Network, of the Portuguese Territorial Committee of the
International Commission for Optics and of the Portuguese Society for Optics and Photonics. Senior member of SPIE and
fellow of European Optical Society.
“3D SURFACE INSPECTION AND REPRODUCTION”
ABSTRACT: Non-destructive dimensional inspection of surfaces is an issue of utmost importance in a large
number of situations in R&D and at the industrial world. An increasing number of surfaces and surface
types must be microtopographically characterized in a non-destructive non-invasive way. Statistical
parameters, both 2D and 3D, are fundamental to a useful quantitative characterization of the surface’
relief. However the two and tridimensional magnified representation of the microtopographic structure of
the surface, allowing a comfortable and detailed visualization of the relief structure, gives very meaningful
insights and is more and more requested. Increasing computer processing power and speed and new
software allows our days a very efficient visual inspection of the results of the microtopographic
inspection of surfaces and parts. Recently the resolution accuracy and reliability of 3D printers is achieving
rather interesting figures. It is now possible not only to visualize, in a high resolution screen, the amplified
3D relief structured of the surface but also it is possible to 3D print it. The “tactile” visualization of the 3D
printed physical model of the inspected surface is an interesting experience that may lead to a fast
meaningful assessment of the relief of the inspected surface. Optical triangulation in different approaches
allow the establishment of metrological systems that by its inherent relative simplicity versatility
robustness and reliability can cope with most modern requirements of the non-invasive inspection of
objects and surfaces both smooth or rough. In this communication we will present a brief review of the
work done at the Microtopography Laboratory of the Physics Department of the University of Minho,
Portugal, on the optical triangulation based microtopographic inspection of surfaces.
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Prof.Sarun Sumriddetchkajorn
Ministry of Science and Technology ,THAILAND
“Optical metrology in agriculture”
ABSTRACT: Optics and photonics can play a very significant role in precision agriculture. Especially,
optical imaging and optical spectroscopy once combined with other disciplinary such as electronics,
mechanical, and computer engineering can lead to optical sensing systems highly suitable for agriculture
applications. Highlights in this talk include modules and systems that are already deployed in for rice
fields, shrimp farms, and silk industry.
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Dr.Gao Wei
Tohoku University, Japan
Dr. Wei Gao received his Bachelor of Precision Instrumentation from Shanghai Jiao Tong University, China, in 1986, followed
by MSc and Ph. D from Tohoku University, Japan, in 1991 and 1994, respectively. He is currently a professor and the
director of Research Center for Precision Nanosystems, Department of Nanomechanics of Tohoku University. He has been
working in the field of precision engineering, specialized in precision metrology and micro/nano-metrology. He has
developed a number of surface form measurement systems as well as several sensor technologies for precision positioning.
He is a fellow of CIRP, and a fellow of the International Society for Nanomanufacturing. He serves as the Chairman of The
Scientific Technical Committee Precision Engineering and Metrology of CIRP. He is also a Vice President of the Japan Society
for Precision Engineering (JSPE) in the Japanese academic year of 2015. He works in the editorial board of several
international journals such as the International Journal of Nanomanufacturing. In addition to the publications of academic
papers, he has applied 50 patents (20 issued). He is the author of the book “Precision Nanometrology – Sensors and
Measuring Systems for Nanomanufacturing” (Springer). He has won five Paper Awards from JSPE.
“Nanofabrication and applications of large-area microstructured optical elements”
ABSTRACT: Artifacts with surfaces composed of three-dimensional (3D) microstructures are required for
calibration, inspection of measuring instruments such as scanning probe microscopes, mechanical stylus
profilers and optical microscopes. Recently, new types of optical sensors and optical measuring
instruments are also developed by using large-area microstructured artifacts as the reflective and
diffractive optical components. This keynote will present nanofabrication and applications of such
microstructured artifacts for optical metrology. The technology of fabricating a large-area 3D sinusoidal
microstructued surface by using ultra-precision machining based on fast-tool servo will be presented,
followed by some nanometrology techniques for compensating the fabrication errors. An in-process
fabrication and measurement system called the FS-FTS will then be presented by nanofabrication of large
area micro-lens arrays. A multi-axis optical sensor by using large-area micro-structured surfaces as the
scales for precision measurement of positions will also be introduced.
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Dr. Leslie L. Deck
Zygo Corporation, USA
Dr. Leslie L. Deck is a Technology Fellow at Zygo Corporation, located in Middlefield, Connecticut. ZYGO designs, develops,
manufactures and markets high-performance optical measuring instruments and precision optical components. Dr. Deck is
a Particle Physics Ph.D. who has been working in the optical sciences for 25 years, holds 50 patents and has published over
40 papers in optical metrology, primarily in the field of interferometry and its application to distance measurement and
surface profiling
“Modern high precision interferometric testing of optical components”
ABSTRACT: Optical interferometry is widely used for surface topography measurements thanks to its
precision, flexibility and ease of use. However, the precision of interferometry also makes measurements
sensitive to uncontrolled error sources. Modern interferometric testing instruments are designed to
deliver high performance in the presence of these imperfect conditions, which include vibration, air
turbulence, stray light, aberrations, improper focus and operator error. These advances have enabled
significant improvements in measurement robustness, repeatability, fidelity and lateral resolution. Here I
review techniques in current use for surface form and waviness metrology of optical components, as well
as perspectives on future developments.
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Prof. Dr. Xiang Peng
College of Optoelectronics Engineering, Shenzhen University, China
Prof. Dr. Xiang Peng received his B.S., M.S., and Ph.D. from Tianjin University in 1981, 1984, and 1989, respectively, all in
Optical Engineering. His doctorate dissertation involved in laser speckle statistics and its application to velocimetry with a
photo-counting technique. From July 1985 to July 1986, he is a visiting scholar at the Department of Electrical and
Electronic Engineering, University of Huston, TX, USA. From August 1990 to June 1992, Dr. Peng was awarded a fellowship
by Alexander von Humboldt Foundation, Germany. He worked with Institute of Applied Optics (ITO) at University of
Stuttgart as an Alexander von Humboldt Fellow. Dr. Peng’s research activities at ITO involved in electronic speckle pattern
interferometry and its application to 3D contouring. Since October 1984, Xiang Peng has been with Tianjin University as
Assistant Professor, Associate Professor (1992), and Full Professor (1998). He has joined Shenzhen University in January,
2003 and has been keeping his position as Adjunct Professor at Tianjin University. Dr. Peng has also been Adjunct Professor
since 2007 at Clemson University, NC, USA. Prof. Peng held several visiting positions at University of Calgary, CA, in 1999
and at the Hong Kong University of Science and Technology (HKUST) in 1996, 1998, 2001, respectively. Dr. Peng’s research
work in Calgary involved in Reverse Engineering with help of 3D imaging and Modeling, and his research activities at HKUST
involved in Optical Security. Prof. Peng’s current research interests include Optical Imaging, Metrology, and Optical Security.
Prof. Peng has numerous publications in refereed journals and was awarded more than 20 inventions wherein ten of
patents have been transferred to ESUN Co. Ltd., a listed company in Shenzhen. He also serves as the Director of
Engineering Laboratory for 3D imaging and modeling of Shenzhen Government and senior technical consultant at ESUN Co.
Ltd. At the College of Optoelectronics Engineering (COE) of Shenzhen University, Prof. Dr. Xiang Peng is leading a research
group to conduct researches in the areas of 3D imaging and modeling, optical security, and phase-optics based imaging and
display. Prof. Peng’s research activities have been supported by Natural Science Foundation of China (NSFC), Sino-German
Center for Research Promotion (SGCRP), the Natural Science Foundation of Local Governments of Guangdong Province and
Shenzhen city, and Industrial Sectors.
“3D Imaging and modeling: a bridge from physical world to digital world”
ABSTRACT: The technology for optical imaging and modeling can be served as a bridge from physical
world to virtual world. A single optical digitizer or 3D optical sensor network composed of multiple node
sensors can be regarded as kinds of optical instruments that works on the principle of computational
imaging. In order to reconstruct 3D image it is necessary to decode the fringe pattern to get the phase
map that acts as special marks encoding each point of test object or scene, resulting in accurate
determination of point correspondence. Once the homologous pairs identified precisely a 3D image can
be obtained through a series of computations. This presentation will talk about an optical digitizer based
on the strategy of phase-aided active stereo (PAAS) which has been widely applied in many practical
applications, including reverse engineering, industrial inspection, plastic surgery, etc. Furthermore,
multiple PAAS-based optical digitizers can be used to construct a measurement network, which will be
- 18 -
very useful for garment industry, body measurement, and electronic commerce. This talk will also address
some important issues involved in such a measurement network. In addition, some typical case studies
will also be presented to show great potentials of 3D optical digitizer based on the PAAS strategy and
PAAS-based optical measurement network.
- 19 -
Prof. Zhao Chunyu
Arizona Optical Metrology LLC,United States
Dr. Chunyu Zhao is Co-founder and President of Arizona Optical Metrology LLC (www.cghnulls.com), a company that
provides computer generated holograms (CGH) for testing aspheric surfaces, as well as a stitching software package called
ZBR. He is also an adjunct faculty member at the University of Arizona, College of Optical Sciences. He got B.S. in physics
and B.E. in mechanical engineering in 1993 from Tsinghua University, Beijing, China, and M.S. in 1999 and PhD in 2002,
both in optical engineering from the University of Arizona. Dr. Zhao has over 15 years’ experience in design, development,
and build of interferometric systems for testing large aspheric optical surfaces. Dr. Zhao has authored/co-authored about 70
technical papers and presented dozens of talks at international conferences.
“Computer Generated Holograms for optical testing – a review of historical and recent
developments”
ABSTRACT: Computer Generated Hologram or CGH, in combination with a laser interferometer, is the de
facto standard for precision measurement of aspheric surfaces or wavefronts. In this talk I first give a
review of the historical development of the CGH technology, following the time line from the first
publication on the concept of holography, to the creations of the first laser holograms, to the idea and
realizations of holograms generated by computer, up to the research, development and application of the
CGH technology for optical testing. As the technology gets widely accepted, more innovations happened
in areas of CGH fabrication pushing the technology envelope, as well as creative use of the CGH to do the
previously unthinkable. I will give a few examples in each area.
- 20 -
Prof. Yu-Lung Lo
Department Head, Distinguished Professor, Department of
Mechanical Engineering
Department Head, Distinguished Professor, Department of Mechanical Engineering
National Cheng Kung University (NCKU), Micro Opto-Electronics Sensor Laboratory
Tainan, Taiwan
Chairman, Asian Society of Experimental Mechanics (ASEM)
http://www.me.ncku.edu.tw/enus/content/yu-lung-lo
- 21 -
Dr. Yang Yu
Taylor Hobson Ltd, UK
“Fast and precise 3D form error characterisation of aspheric optics”
ABSTRACT: A method for non-contact 3D form measurement of aspheric surfaces is presented. The
principle is based on Multi Wavelength Interferometry (MWLI). This scanning interferometer can quickly
provide complete and precise 3D form error analysis with high data density at high accuracy in a short
measurement time. The system allows complete geometric inspection of aspheres without restrictions in
terms of spherical departures. It can measure a wide range of special optics including annular lenses,
segmented, ground and discontinued optics, small and thin optics, slight freeform optics and even
structured optics with a high aspect ratio such as Fresnel lenses. The optics can be polished or ground and
can be made of opaque or transparent materials. The system is robust against external vibrations and can
be used on the shop floor.
- 22 -
Dr. ZHANG Yilei
Nanyang Technological University, Singapore
“Development of DMD based non-diffraction beam shaping”
ABSTRACT: Non-diffraction beams have many unique properties and applications in material processing,
imaging or micromanipulation. By loading different patterns on a Digital Micromirror Device (DMD),
non-diffraction beams, such as Airy beams and Bessel beams, have been successfully generated and
experimentally verified. By controlling the DMD patterns, the generated beams could be controlled as well
in term of FWHM, non-diffraction zone size, etc. The DMD based superposition of Bessel beams is also
demonstrated. At last, explicit relationships are developed to model the DMD based non-diffraction
beam shaping.
- 23 -
Dr.Fengzhou Fang
Tianjin University ,China
- 24 -
Prof. Yingjie Yu
Lab. of Applied Optics and Metrology, Dept. of Precision Mechanical
Engineering, Shanghai University, China
Prof. Yingjie Yu,Obtained her doctor degree in 1998 and master degree in 1996 from Harbin Institute of Technology. From
1999, she works at the dept. of precision mechanical engineering, shanghai university. Her research area is optical
metrology and interesting focuses on digital interferometry, digital holography and electronic speckle interferometry. Now
her projects are about stitching interferometry for the cylindricity error measurement, on-situ testing of flatness of large
scale optics on machine tool by dynamic interferometer, sub-surface damage testing by compressive holography and 3D
holographic display. The finical support is from the National Natural Science Foundation of China(NSFC)，the Ministry of
Science and Technology of China(MOST), the Science and Technology Commission of Shanghai Municipality(STCSM), and
also from some industrial companies. Now she is executive director and secretary-general of the precision machinery
branch of china instrument and control society(CIS).
“Compressive Holographic Tomography”
ABSTRACT: Holographic recording is the process of compressing signal from three dimensional data to
two dimensional data. Each pixel in the hologram contains the information of every single point in the
three-dimensional object. Theoretically, it has a large amount of redundant information. Compressive
sensing can restore the original signal from a small amount of measurement data accurately or with
high-probability, and meanwhile realize data reconstruction from low dimension to high dimension.
Thereby it can realize tomographic reconstruction of three-dimensional object from small amount of
holographic data. Therefore, more attention is gradually paid to digital holographic tomography based on
compressive sensing. After analyzing the domestic and overseas research status and the existing
problems of this technology, related theoretical analysis and experimental research for different
holographic recording system are carried out, which focus on the method, the quality and the axial
resolution of digital holographic tomographic reconstruction based on compressive sensing.
- 25 -
Dr. Tong Cunzhu
Changchun Institute of Optics, Fine Mechanics and Physics
(CIOMP),China
Dr. Cunzhu Tong, received the B.S. and M.S. degrees in physics from Chongqing University, Chongqing, China, and the
Ph.D.degree from the Institute of Semiconductors, Chinese Academy of Sciences (CAS), Beijing, China. He was a research
fellow with Nanyang Technological University (NTU), Singapore, from 2005 to 2009. After that he joined the Edward S.
Rogers Sr. Department of Electrical and Computer Engineering, University of Toronto, Canada, as a post-doctoral researcher.
He became the professor of Hundred Talents Program in CAS in 2010 and was with the Changchun Institute of Optics, Fine
Mechanics and Physics (CIOMP), CAS, Changchun, China. He was the distinguished elite professor of CAS since 2015 and
the standing committee member of Chinese Society Astronautics since 2013. He is the deputy director of State Key Lab of
Luminescence and Applications, and also a reviewer of the National Key Research and Development Plan of China. He won
several awards including the outstanding young scientist award, Person of the Year 2012, selected by SCIENTIFIC CHINESE,
the Excellent Award for Hundred Talents Program of CAS and the Important Achievements in China Optics 2015 etc. He has
authored and co-authored over 80 refereed journal papers. His current research interests include the photonic crystal
semiconductor lasers, beam shaping and combining of semiconductor lasers and the semiconductor disk lasers.
“Beam Control and Power Scaling of Diode Lasers”
ABSTRACT: Diode lasers show many advantages including the high electro-optical efficiency, small
volume, low weight, long lifetime and low cost, but the disadvantages such as large divergence,
oval-shaped beam and the relative low-power as the direct source for industry still affect their applications.
In this talk, I will introduce our works on how to control the beam shape, divergence in fast- and slow-axis
of laser diodes using photonic bandgap principle and microstructures. The power scaling of laser diodes
based on the beam shaping and combining approaches using the diffraction optical elements is also given.
The developing trends and the competition of direct diode lasers with the solid state lasers and fiber
lasers are also discussed.
- 26 -
Dr. Chao Zuo
Department of Electronic and Optical Engineering, Nanjing
University of Science and Technology (NUST), China
Chao Zuo is a professor at the department of Electronic and Optical Engineering, Nanjing University of Science and
Technology (NUST). He received his Ph.D. and B.S. from Nanjing University of Science and Technology in 2014 and 2009.
He was a research assistant at Centre for Optical and Laser Engineering (COLE), Nanyang Technological University (NTU),
Singapore, from 2012 to 2014. Now he is the principal investigator of the Smart Computational Imaging Laboratory (SCILab)
at NUST where the research interest focuses on computational imaging, phase retrieval, optical information processing, and
high-speed 3D optical sensing. He has published over 40 papers in peer-reviewed journals with total citation over 700 times
according to Google Scholar.
“Computational microscopy with programmable illumination and coded aperture”
ABSTRACT: Computational microscopy is an emerging technology which extends the capabilities of optical
microscopy with the combination of optical coding and computational decoding. It provides us with novel
imaging functionalities or improved imaging performance which are difficult or impossible to achieve
using a conventional microscopic system. Recent advance in LED lighting and digital display technology
provide new opportunities for active digital illumination and imaging control for advancing microscopy. In
this talk, we report our most recent developments of computational microscopy with programmable
illumination and coded aperture. We describe several new approaches for achieving multi-modal
computational imaging, including contrast-enhancement imaging, quantitative phase imaging, light field
imaging, giga-pixel high-resolution imaging and lens-less tomographic imaging, with use of a
programmable LED array or a programmable LCD panel.
- 27 -
Dr. Qinghua Wang
National Institute of Advanced Industrial Science and Technology,
Japan
Chao Zuo is a professor at the department of Electronic and Optical Engineering, Nanjing University of Science and
Technology (NUST). He received his Ph.D. and B.S. from Nanjing University of Science and Technology in 2014 and 2009.
He was a research assistant at Centre for Optical and Laser Engineering (COLE), Nanyang Technological University (NTU),
Singapore, from 2012 to 2014. Now he is the principal investigator of the Smart Computational Imaging Laboratory (SCILab)
at NUST where the research interest focuses on computational imaging, phase retrieval, optical information processing, and
high-speed 3D optical sensing. He has published over 40 papers in peer-reviewed journals with total citation over 700 times
according to Google Scholar.
“Advanced Moire techniques for crack and structural health monitoring”
ABSTRACT: In optical metrology, Moire techniques are mature but still growing for deformation
measurements from the nanoscale to the kilometer scale. A commonality exists in different Moire
techniques using a microscope or an imaging sensor at different scales pointed out in this talk. Several
typical Moire techniques including the microscope scanning Moire method and the sampling Moire method
combined with a temporal or spatial phase-shifting technique are introduced. Slight variation of the used
working distance under a laser scanning microscope is found to bring a nonnegligible error on microscale
strain, and we suggest to record 2D scanning moiréfringes for accurate strain measurement to make the
error less than 100 με. The latest development of advanced Moire techniques and applications are
presented in full-field displacement and strain measurements of materials especially composite materials.
Distributions of x-direction, y-direction, shear and principal strains are employed to predict the microscale
crack occurrence successfully. Dynamic deflections of bridges under different fast-passed automobiles are
accurately determined for structural health monitoring. A perfect combination between the scanning and
sampling Moirémethods provide an effective way for high-sensitivity and high-accuracy deformation
measurement in a large field of view.
- 28 -
Assoc. Prof. Zhenyu Jiang
School of Civil Engineering and Transportation, South China
University of Technology, Guangzhou 510640, China
“High accuracy digital image correlation accelerated by parallel computing technology”
ABSTRACT: Digital image correlation (DIC) has demonstrated its importance and flexibility in high
precision, non-contact and full field optical measurements nowadays. In the methodology study of DIC,
two key issues have been investigated persistently in the past decades, i.e. measurement accuracy and
computation efficiency. To achieve high accuracy, various sub-pixel registration algorithms have been
developed, among which the iterative DIC algorithms, represented by the forward-additive
Newton-Raphson (FA-NR) algorithm and the inverse compositional Gauss-Newton (IC-GN) algorithm,
have been proven to be superior choices and become the virtual standard DIC algorithms in academic and
industrial communities. However, the iterative DIC algorithms are computationally expensive due to their
nature of non-linear optimization, which makes the computation efficiency a major challenge. Very
recently, parallel computing technology has been introduced to accelerate the iterative DIC algorithms.
The parallel computing can be implemented based on multi-core CPU or GPU devices, and leads to
significant speed up. In this presentation, the DIC powered by the two parallel computing techniques will
be elucidated and compared. GPU-based implementation demonstrates the superiority over the
multi-core CPU-based implementation by combining coarse-grain and fine-grain parallelization, and
meets the speed requirement for real-time high accuracy DIC.
- 29 -
Sep.26|
Monday
Tibet Hotel lobby
Registration: Renne. Gao, Celine Xi, Cindy Lau, Amy Hu, Jennifer Rowe
Note: *Collecting conference materials *Certificate will be get at the registration desk.
10:00am-17:00pm
*Accommodation not provided, and it’s suggested to make an early reservation.
Registration: Renne. Gao, Celine Xi, Cindy Lau, Amy Hu, Jennifer Rowe
10:00am-17:00pm
Sep. 27| Tuesday| Morning
Homalayan Hall
Opening Remarks
Conference Chair-Prof. Anand Krishna Asundi, School of Mechanical & Aerospace
9:00-9:05am
Engineering, Nanyang Technological University, Singapore
Keynote Speech
Prof. Dr. Wolfgang Osten, University of Stuttgart, ITO, Germany
Keynote Speech
Prof. Motoharu Fujigaki, University of Fukui, Japan
Coffee Break & Group Photo
Keynote Speech
Prof. Byoungho Lee, Seoul National University, Korea
9:05-9:50am
9:50-10:35am
10:35-11:00am
11:00am-11:45am
Keynote Speech
Prof. Dr. Ralf B. Bergmann, BIAS - Bremer Institut für angewandte Strahltechnik GmbH,
11:45am-12:30pm
Bremen, Germany
July 19th| Tuesday| Afternoon
Lunch
12:30pm-13:30pm
Plenary Speech
Plenary Speech
Prof. Xie Huimin, Dept of Eng. Mechanics,
Prof. Manuel Costa, University of Minho,
Tsinghua University, China
Portugal
Plenary Speech
Plenary Speech
Prof. Sarun Sumriddetchkajorn, Ministry of
Prof. Xiang Peng, Shenzhen University,
Science and Technology ,THAILAND
China
Plenary Speech
Plenary Speech
Prof. Zhao Chunyu, Arizona Optical
Dr. ZHANG Yilei, Nanyang Technological
Metrology LLC, United States
University, Singapore
14:00-14:30pm
14:30-15:00pm
Plenary Speech
Plenary Speech
Dr. Gao Wei, Tohoku University, Japan
Prof. Yu-Lung Lo, Department of
15:00-15:30pm
Mechanical Engineering
Coffee break & poster session
Invite Speech
Invite Speech
Dr. Tong Cunzhu, Fine Mechanics and
Prof. Yingjie Yu, Shanghai University,
Physics (CIOMP),China
China
15:30-16:30pm
16:30-16:50pm
Invite Speech
Invite Speech
Dr. Chao Zuo, Nanjing University of
Science and Technology (NUST), China
Session 1-5
13:30pm-14:00pm
Dr. Qinghua Wang, National Institute of
Advanced Industrial Science and
16:50-17:10pm
Technology, Japan
Session 2-5
Dinner- Welcome Ceremony
- 30 -
17:10pm-18:30
18:30-20:00
Tibet Hotel lobby
Registration: Renne. Gao, Celine Xi, Cindy Lau
10:00am-17:00pm
Sep. 28| Wednesday| Morning
Homalayan Hall
Opening Remarks
Conference Chair-Prof. Anand Krishna Asundi, School of Mechanical & Aerospace
Engineering, Nanyang Technological University, Singapore
Keynote Speech
Prof. Perry Shum, School of EEE, Nanyang Technological University, Singapore
Plenary Speech
9:05-9:50am
9:50-10:20am
Dr. Leslie L. Deck, Zygo Corporation
Coffee Break & Group Photo
Plenary Speech
10:20-10:40am
10:40-11:10am
Dr. Fengzhou Fang, Tianjin University, China
Plenary Speech
11:10-11:40am
Dr. Yang Yu, Taylor Hobson Ltd, UK
Lunch
Sep. 29 to 30 Sep. 28| Wednesday | Afternoon
9:00-9:05am
11:40-13:00pm
SPC Competition I
SPC Competition III
Metrology-10
Laser Technology-10
Coffee Break
13:00pm-15:40pm
15:40-16:00pm
Invite Speech
SPC Competition II
Assoc. Prof. Zhenyu Jiang, South China
Others-8
University of Technology, China
16:00-18:10pm
Session 3: Image Processing
Dinner- Award Ceremony
Tour
- 31 -
18:10-19:30pm
Chair: Prof. Anand Krishna Asundi, School of Mechanical & Aerospace Engineering,
Nanyang Technological University, Singapore
Venue: Homalayan Hall
9:00am-12:30am
Prof. Anand Krishna Asundi
9:00-9:05am
School of Mechanical & Aerospace Engineering, Nanyang Technological University,
Opening Remarks
Singapore
Prof. Dr. Wolfgang Osten
9:05-9:50am
University of Stuttgart, ITO, Germany
Keynote Speech
"Optical metrology in the conflict between desire and reality: Challenges and Solving
9:50-10:35am
Keynote Speech
10:35-11:00am
11:00am-11:45am
Keynote Speech
11:45am-12:30pm
Keynote Speech
Homalayan Hall
Strategies"
Prof. Motoharu Fujigaki
University of Fukui, Japan
“Application of Sampling Moire Method and Phase Analysis Method to Structural Health
Monitoring of Infrastructures”
Coffee Break & Group Photo
Prof. Byoungho Lee
Seoul National University, Korea
"Optical tools for augmented reality"
Prof. Dr. Ralf B. Bergmann
BIAS - Bremer Institut für angewandte Strahltechnik GmbH, Bremen, Germany
"Computational optical metrology"
*The Group Photo will be updated online.
**One best presentation will be selected from each session, the best one will be announced at the end of each
session and awarded certificate during the dinner, and the winners’ photos will be updated online.
***Best Presentation will be evaluated from: Originality; Applicability; Technical Merit; PPT; English.
****Please arrive at the conference room 10 minutes earlier before the session starts, copy your PPT to the
laptop.
- 32 -
Chair: Prof. Prof. Xie Huimin, Dept of Eng. Mechanics, Tsinghua University, China
Venue: Homalayan A
13:30pm-15:30pm
Prof. Xie Huimin
13:30-14:00pm
Dept of Eng. Mechanics, Tsinghua University, China
Plenary Speech
"Moirégrating fabrication techniques based on the nanoimprint lithography and
applications"
Prof. Sarun Sumriddetchkajorn
14:00-14:30pm
14:30-15:00pm
Plenary Speech
Ministry of Science and Technology ,THAILAND
Homalayan A
Plenary Speech
"Optical metrology in agriculture"
Prof. Zhao Chunyu
Arizona Optical Metrology LLC, United States
"Computer Generated Holograms for optical testing – a review of historical and recent
developments"
Dr. Gao Wei
15:00-15:30pm
Plenary Speech
15:30-16:30pm
Tohoku University, Japan
"Nanofabrication and applications of large-area microstructured optical elements"
Coffee Break & Poster Session A
Note:
* The certification of Plenary, Poster presentations and listeners will be awarded certificates at the end of
session.
* For the Best Presentation of poster session, it is encouraged to award it to student author prior.
*To show the respect to other authors, especially to encourage the student authors, we strongly suggest you
attend the whole session, the scheduled time for presentations might be changed due to unexpected situations,
please come as early as you could.
- 33 -
Poster Session
Venue: Homalayan A
Time: 15:30pm-16:30pm
Note:
* The certification of Poster presentations, listeners, will be awarded at the end of session.
* For the Best Presentation of session, it is encouraged to award it to student author prior.
*To show the respect to other authors, especially to encourage the student authors, we strongly suggest you
attend the whole session, the scheduled time for presentations might be changed due to unexpected situations,
please come as early as you could.
Noise Figure of EDFA in the Analog Optical System
Mr. DING Yu, HU Zhengliang, YANG Yangyang
National University of Defense Technology, China
By introducing an amplified spontaneous emission source as additional noise, two sets of
experimental schemes are designed to measure noise figure characteristics of Erbium-Doped
Fiber Amplifier employed in an analog optical system. The impacts of the signal power and
the Signal to Noise Ratio on the Noise Figure are systematically measured. The qualitative
conclusions are obtained that the decline of the input optical power and improvement of
signal to noise ratio will lead a rising Noise Figure of Erbium-Doped Fiber Amplifier. These
results will benefits the optimization of the analog optical amplifier by providing the proper
working conditions of the Erbium-Doped Fiber Amplifier.
Determination of Optic system Technical indicators of Star Sensor
Mr. Zhao Chao, Fu Sihua, Jiang Guangwen, Tan Xiaolin
National University of Defense Technology, China
The determination of optical system parameters is the first step in the design of optical
system of star sensor. In this paper, the influence of the field of view, focal length and
relative aperture of the optical system on the star sensor is analyzed. In the selected detector
conditions, according to the field, the focal length, and the magnitude of threshold of mutual
restriction, signal-to-noise ratio, the size of the catalog and optical system design considering
the level of to determine the optical system of the field, focal length, relative aperture,
magnitude of threshold, spectral range and center wavelength. In order to meet the signal to
noise ratio, the stellar detection limit, detection probability and other requirements, the
selected detector were calculated. The method of determining the parameters provide a
reference for the design of the optical system of star sensor.
Study on deformation measurement of position and attitude based on the fold line
videometrics
Mr. Tan Xiao-lin, Jiang Guang-wen, Fu Si-hua and Zhao Chao
- 34 -
National University of Defense Technology, China
Combining with the fold line videometrics, a method for pose estimation based on monocular
measurements is studied. The method to measure the inertial position of the Photometric
transfer station and the Orthogonal Iterative Algorithm based on the image space collinearity
error is summarized. Then, the mistake using the Singular Value Decomposition (SVD) to
solve is described and then introduce the improving algorithm. Finally, the Simulation and
actual experiment is done to verify the accuracy of pose estimation using the fold line
videometrics. The results show that the precision can reach 1mm or less using a camera with
the resolution of 1280 by 1024 pixels, in the condition of 4.5 meter capturing distance and a
Leica TS30.
Research on high power intra-channel crosstalk attack in optical networks
Mr. Ren Shuai, Zhang Yinfa, Wang Jingyu, Zhang Jumei, Rao Xuejun, Fang Yuanyuan
Shuai Ren, Xi’an Communications Institute, China
The mechanism of high power intra-channel crosstalk attack is analyzed theoretically and the
conclusion that power of attack signal and crosstalk coefficient of optical switch are the main
factors for which high power intra-channel have destructive effect on quality of legitimate
signals is drawn. Effects of high power intra-channel crosstalk attack on quality of legitimate
signals and its capability of attack propagation are investigated quantitatively by building the
simulation system in VPI software. The results show that legitimate signals through the first
and the second stage optical switch are affected by attack and legitimate signal through the
third stage optical switch is almost unaffected by attack when power of original attack signal
(OAS) is above 20dB more than that of legitimate signals and crosstalk coefficient of optical
switch is -20dB at optical cross connect 1 (OXC1). High power intra-channel crosstalk attack
has a certain capability of attack propagation. Attack capability of OAS can be propagated to
OXC3 when power of OAS is 27dB more than that of legitimate signals and crosstalk
coefficient of optical switch is -20dB. We also find that the secondary attack signal (SAS)
does not have capability of attack propagation.
The Review of the IR Radiation Characteristic of Exhaust Plume of the Liquid Rocket
Engine
Ms. Wu Hanyang, Sheng Weidong, An Wei, Zeng Jian, Yang Yuanyuan
National University of Defense Technology, China
At present, there are various methods to compute the infrared radiation characteristics of
exhaust plume of the liquid rocket engine. Though they are different in computational
complexity. Their ideas and methods are alike. This paper focuses on the computation
methods of exhaust plume’s flow field, spectral parameters and radiation transfer equation.
Comparison, analysis and conclusion of these methods are presented. Furthermore, existing
problems and improvements of them are proposed as well.
Colored Adaptive Compressed Imaging Using Color Space Conversion
Ms. Yiyun Yan, Huidong Dai, Jin Gao, Chaowei Li, Xingjiong Liu, Weiji He, Qian Chen,
- 35 -
and Guohua Gu
Nanjing University of Science and Technology, China
Computational ghost imaging (CGI) is mainly used to reconstruct grayscale images at
present and there are few researches aiming at color images. In this paper, we both
theoretically and experimentally demonstrate a colored adaptive compressed imaging
method. Benefiting from imaging in YUV color space, the proposed method adequately
exploits the sparsity of U, V components in the wavelet domain, the interdependence
between luminance and chrominance, and the human visual characteristics. The simulation
and experimental results show that our method greatly reduces the measurements required,
and offers better image quality compared to recovering red (R), green (G) and blue (B)
components separately in RGB color space. As the application of single photodiode
increases, our method shows great potential in many fields.
Optical application of electrowetting
Ms. Mei He, Runling Peng
University of Shanghai for science and technology, China
Since electrowetting has been proposed, researchers began to apply eletrowetting into
different fields, such as lab-on-chip systems, display technologies, printings and optics etc.
This paper mainly introduced structure, theory and application of optical devices based on
electrowetting. The optical devices include liquid optical prism, liquid optical lens and
display. The paper introduced their principle, specific application and many advantages in
optical applications. When they are applied to optical system, production and experiment,
they can reduce mechanical moving parts, simplify the structure, operate easily,
lower manufacturing cost and energy consumption, improve working efficiency, and so on.
We learn and research them in detail that will contribute to research and develop optical
eletrowetting in the future.
Characterization of surface defects of silicon substrates by the total scattering and absorption
Dr. Zhang Kepeng, Zhang Xingxin, Huang Wei
The Institute of Optics and Electronics the Chinese Academy of Sciences, China
The performance of optical systems is obviously affected by the surface defects of optical
components in terms of losses and image degradation. In this paper, the feasibility of
characterizing surface defects of Silicon substrates was investigated by the total scattering
(TS) and absorption. The TS values of three Si substrates with different surface finish level
were obtained by using the total scattering measurements at wavelength of 633nm. The
surface roughness was analyzed by the atomic-force microscope (AFM) and the number of
1μm diam defects in a beam spot was recorded by the optical microscope. Additionally, the
scattering value of 1μm diam defects was determined by the ratio of the different value
between TS value and the scattering value induced by roughness to the number of the defects
in a beam spot. Furthermore, based on the Mie scattering theory, the theoretical value was
calculated and was compared with the measured results. The results show that both the
theoretical and measured results have the same order of magnitudes. What’s more, in order to
study the absorption, the absorption of four samples that include three Si substrates with
different finish level and one Si substrate with a high reflector coating were measured by
using the surface thermal lensing technique. The experimental results reveal that the poorer
- 36 -
the finish level is, the more the number of surface defects is. Finally, the absorptance
mapping of the high reflector was plotted and compared with the results observed by the
optical microscope and the results indicate that the absorption measurement is an effective
method to characterize the surface defects of Si substrates.
Marine Boundary Layer NO2 Measurements by Ship-borne MAX-DOAS during an offshore
observation campaign, 2015
Mr. Xianxin Li, Zhangjun Wang, Chao Chen, Xiangqian Meng, Xingtao Liu, Qiaojun Liu,
Junle Qu, Libin Du
Institute of Oceanographic Instrumentation, Shandong Academy of Sciences, China
The observations of marine boundary layer NO2 vertical column density (VCD) over the
yellow sea near Qingdao by ship-borne Multi-Axis Differential Optical Absorption
Spectroscopy (MAX-DOAS) were conducted with a Chinese oceanographic research vessel,
XYH 08, during an offshore observation campaign, from 13 September 2015 to 18
September 2015. During the observation campaign, the ship-borne MAX-DOAS system
made anchor point measurements in different sea areas including Qingdao coastal waters, the
Yellow Sea, the Jiaozhou Bay and the Yangkou Bay area. Measurements results of anchor
point measurements are presented in this paper. The air mass factor (AMF) errors caused by
the vibration of the ship are also studied in this paper. Under good sea conditions on 14
September, the AMF errors of NO2 measurements caused by the ship vibration were
evaluated to be less than 5%. By combining geometric character of monitoring area and
weather condition, it can be concluded from the Jiaozhou Bay and the Yellow Sea
measurement results that the meteorological conditions cause significant influence on local
boundary layer NO2 content. The comparison of different anchor point measurements
showed that the Jiaozhou Bay sea area had much more NO2 content than Yangkou sea area
because the Jiaozhou Bay sea area is located in Qingdao urban area with surrounding NO2
contamination.
Micro-vibration detection with heterodyne holography based on time-averaged method
Mr. XiaoDong Qin, Feng Pan, ZongHui Chen, XueQin Hou, Wen Xiao*
Beihang University, China
We propose a micro-vibration detection method by introducing heterodyne interferometry to
time-averaged holography. This method compensates for the deficiency of time-average
holography in quantitative measurements and widens its range of application effectively.
Acousto-optic modulators are used to modulate the frequencies of the reference beam and the
object beam. Accurate detection of the maximum amplitude of each point in the vibration
plane is performed by altering the frequency difference of both beams. The range of
amplitude detection of plane vibration is extended. In the stable vibration mode, the
distribution of the maximum amplitude of each point is measured and the fitted curves are
plotted. Hence the plane vibration mode of the object is demonstrated intuitively and
detected quantitatively. We analyzed the method in theory and built an experimental system
with a sine signal as the excitation source and a typical piezoelectric ceramic plate as the
target. The experimental results indicate that, within a certain error range, the detected
vibration mode agrees with the intrinsic vibration characteristics of the object, thus proving
the validity of this method.
- 37 -
The Relative Pose estimation of Aircraft Based on Contour Model
Mr. Fu Tai, and Sun Xiangyi
National University of Defense Technology, China
This paper proposes a relative pose estimation approach based on object contour model. The
first step is to obtain a two-dimensional (2D) projection of three-dimensional
(3D)-model-based target, then we proceed by extracting the target contour in each image and
computing their Pseudo-Zernike Moments(PZM), thus a model library is constructed in an
offline mode. Next, we spot a projection contour that resembles the target silhouette most in
the present image from the model library with reference of PZM; then similarity
transformation parameters are generated as the shape context is applied to match the
silhouette sampling location, from which the identification parameters of target can be
further derived. Identification parameters are converted to relative pose parameters, in the
premise that these values are the initial result calculated via iterative refinement algorithm, as
the relative pose parameter is in the neighborhood of actual ones. At last, Distance Image
Iterative Least Squares (DI-ILS) is employed to acquire the ultimate relative pose
parameters.
Target location method based on homography and scene matching for micro-satellite images
Mr. Shengyi CHEN, Xiaochun LIU, Hongliang ZHANG, and Guanwei YAN
College of Aerospace Science and Engineering, National University of Defense Technology;
Micro satellites have been widely used in the target monitoring and tracking. Aimed to
reduce the ground operator's workload, a target location method based on homography and
scene matching is proposed in this paper. For the first time satellite flies over target area, it
needs the operator to take a frame as a reference image and extract the target area which is
regarded as plane scene. When the satellite scan the area again, we take a frame as a
real-time image and calculate the homography induced by the plane. Then rectify the
reference image with the homography to reduce distortion between the two images. Finally,
locate target on the real-time image using matching method. A significant-feature-point
auxiliary positioning method is also proposed to adapt to target area without obvious
features. It adopts affine model to calculated target location on the real-time image.
Simulation experimental results show accuracy and practical value for engineering of the
proposal method.
Research on scattering characteristics of the fog particles in different circumstances
Ms. Kui Li, Liangchao Li and Kang Wang
School of Physics and Optoelectronic Engineering, Xidian University, Xi'an 710071, China
In recent years, the study of haze has become a hot topic because the fog haze problems have
become more and more serious. Under the condition of the infrared and visible light, we have
calculated the scattering properties of the smoke haze particles, soluble fog particles, dust
haze particles and sea fog particles, respectively. And through the analysis of the calculation
results, we concluded that, in the infrared and visible bands, the scattering efficiency, absorb
- 38 -
efficiency and extinction efficiency of the same fog particles is all consistent with the same
or similar laws.
Numerical simulations of dual-waveguide trap with rough and tilted endfaces
Mr. Dai Lei, Xiao Guangzong, Chen Xinlin, Han Xiang, Jin Shilong
National University of Defense Technology, China
We build numerical models of dual-waveguide trap with rough and tilted endfaces using both
the finite element method. The optical field distribution of waveguide trapping house with
rough and tilt endfaces is simulated and analyzed. The results shows that rough endfaces
cause the incident beam scattered and the tilted endfaces make incident beam refracted.
According to optical field distribution, axial and transversal optical trapping forces are
calculated. When endfaces roughness increase, both the axial and transversal trapping forces
decrease, meaning trapping depth decreased. The transversal equilibrium positions move
around unpredictably, off center. The stiffness and width of optical trap change little. When
endfaces tilt angles increase, both the axial and transversal trapping forces decrease, meaning
trapping depth decreased. The transversal equilibrium positions move along minus
transversal axis. It is no obvious change in stiffness and width of optical trap.
Investigation of skin structures based on infrared wave parameter indirect microscopic
imaging
Mr. Jun Zhao, Xuefeng Liu, Jichuan Xiong, Lijuan Zhou
Nanjing University of Science and Technology, China
Detailed imaging and analysis of skin structures are becoming increasingly important in
modern healthcare and clinic diagnosis. Nanometer resolution imaging techniques such as
SEM and AFM can cause harmful damage to the sample and cannot measure the whole skin
structure from the very surface through epidermis, dermis to subcutaneous. Conventional
optical microscopy has the highest imaging efficiency, flexibility in onsite applications and
lowest cost in manufacturing and usage, but its image resolution is too low to be accepted for
biomedical analysis. Infrared parameter indirect microscopic imaging (PIMI) uses an infrared
laser as the light source due to its high transmission in skins. The polarization of optical wave
through the skin sample was modulated while the variation of the optical field was observed
at the imaging plane. The intensity variation curve of each pixel was fitted to extract the near
field polarization parameters to form indirect images. During the through-skin light
modulation and image retrieving process, the curve fitting removes the blurring scattering
from neighboring pixels and keeps only the field variations related to local skin structures.
By using the infrared PIMI, we can break the diffraction limit, bring the wide field optical
image resolution to sub-200nm, in the meantime of taking advantage of high transmission of
infrared waves in skin structures.
Standard images for wake bubble processing method
Assoc. Prof. Huili Wang, Jianwei Wang, Yong Jiang
Joint Laboratory for Extreme Conditions Matter Properties, Southwest University of Science
and Technology and Research Center of Laser Fusion, CAEP, Mianyang 621010, PR China
- 39 -
A new wake bubble processing method based on standard images is developed. The
distribution, size, population, movement of bubbles in ship wakes are most important
characteristic influencing the sonic, optical, conductive and other signatures of ship wakes as
information sources for detecting and tracing moving target in sea. The intuitive and effective
method to get the parameters of wake bubbles is optical imaging. Standard bubble images
can be one of the means of evaluating the performance of imaging processing method. The
standard sequence bubble images are generated which the size, velocity, position of bubbles
and the width of laser sheet are known and can be changed. The effectiveness and accuracy
of the wake bubble image processing method can be evaluated by standard images.
A Laser Ranging Method Based On Grating Diffraction
Mr. Zhuo Jun, Lin Wumei, and Jia Xin
Institute of Optics and Electronics, Chinese Academy of Science, China
Laser has several advantages, such as high brightness, excellent directivity, good
monochromatic, good coherence and so on [1]. Therefore, in ranging schemes which
combine laser sensor technology and automatic control technology [2], the laser ranging is
most commonly used nowadays [3]. First, we introduce the principle of grating diffraction in
this paper, and propose a method for ranging based on the laser reflection characteristics of
target. Let the laser beam reflected from the target through the diffraction grating and lens
and image on the CCD. In the horizontal plane perpendicular to the direction of incidence,
grating, lens and CCD make up of an imaging device, and which can measure the distance of
target for many times by moving itself horizontally. We can calculate the distance through
measuring the range between the central point of the CCD and zero diffraction fringe. Then,
we analyze the influence from the targets’ scattering characteristics. Lastly, we simulate the
different status according to the proportion of mirror reflection of the actual targets’
scattering characteristics and get a conclusion that only the proportion of mirror reflection
exceeds a particular ratio can calculate a valid distance.
Speckle-correlation-based ciphertext-only attack on the double random phase encoding
scheme
Dr. Meihua Liao, Dajiang Lu, Wenqi He, Xiang Peng
Shenzhen University, Shenzhen, China
The speckle correlation technique is applied to ciphertext-only attack (COA) on optical
cryptosystem based on double random phase encoding. According to the inherent merits of
speckle correlation, we have revealed a fact that the ciphertext’s autocorrelation is essentially
identical to the plaintext’s own autocorrelation. Then, a plaintext image can be directly
reconstructed from the autocorrelation of its corresponding ciphertext by employing a iterate
phase-retrieval algorithm. This could then lead to a potential security flaw because an
unauthorized user could directly retrieve the plaintext from an intercepted ciphertext by
performing proposed COA approach. Meanwhile, a series of numerical simulations will also
be provided to verify the validity and feasibility of our proposed COA method.
- 40 -
Comparison of active, passive and adaptive phase error compensation methods using a
universal phase error model
Dr. Zewei Cai, Xiaoli Liu, Qijian Tang, Yongkai Yin, Xiang Peng
Shenzhen University, Shenzhen, China
Nonlinear intensity response, namely gamma effect, of the projector-camera setup introduces
phase error in phase-shifting profilometry. This paper presents a comparison of three phase
error compensation methods: active, passive and adaptive, using a universal phase error
model. The active method calibrates a gamma factor to modify the projected fringe patterns;
the passive method implement an iterative procedure to work out an optimal phase map; the
adaptive method compensate phase error based on Hilbert transform without any auxiliary
conditions. Comparison Experiments were implemented in three and four phase-shifting
steps, which demonstrated that the active method provided an excellent performance
regardless the phase-shifting step, yet the passive method might fail when the phase error
was large; the adaptive method could be in the same level as the passive method in four
phase-shifting steps.
Comparison of sensitivity between in-situ and ex-situ detections with nanoporous TiO2 film
based plasmon waveguide resonance sensor
Dr. Xiumei Wan, Dan-feng Lu, Zhi-mei Qi
Institute of Electronics, Chinese Academy of Sciences, China
Plasmon waveguides were fabricated by coating sol-gel copolymer templated nanoporous
TiO2 films on gold layers sputtered on glass substrates, and they were used to construct
wavelength-interrogated plasmon waveguide resonance (PWR) sensors with Kretschmann
configuration. The cross-sectional image of the plasmon waveguide obtained with scanning
electron microscope indicates that the gold and nanoporous TiO2 films are about 40 nm and
290 nm thick. The resonance wavelength (λR) of the PWR sensor at a given incident angle is
determined from either the reflected light intensity spectrum or the absorption spectrum. The
porosity of TiO2 film was determined to be ca. 0.42 by a comparison between simulation and
experimental results. The PWR sensor operates with transverse electric mode. The in-situ and
ex-situ responses of the PWR sensor to glutathione (GSH) adsorption were investigated
theoretically and experimentally. The simulation results show that with either in-situ or
ex-situ measurement the resonance wavelength linearly increases with increasing GSH
concentration and the slope with ex-situ method is 6 times larger than that with in-situ
method. The PWR sensor’s response to GSH adsorption from the 100 μmol/L solution was
measured to be ΔλR = 31 nm with ex-situ detection and ΔλR = 6.1 nm with in-situ detection.
Both the experimental and simulation investigations reveal that the ex-situ detection
sensitivity is much higher than the in-situ one for the PWR sensor. The work suggests that
the ex-situ detection method can offer the PWR sensor a lower detection limit in contrast
with the in-situ method.
- 41 -
Detection of Benzo[a]pyrene in water using a wavelength-interrogated SPR sensor coated
with Teflon AF2400 film
Ms. Xiaoqing Gong, Li Wang, Xiumei Wan, Dan-feng Lu, Zhi-mei Qi
Institute of Electronics, Chinese Academy of Sciences, China
A wavelength-interrogated surface plasmon resonance (SPR) sensor overlaid with a Teflon
AF2400 film was prepared for rapid and sensitive detection of Benzo[a]pyrene (BaP) in
water. The thickness of the Teflon AF 2400 film is much larger than the penetration depth of
plasmon field, making the SPR sensor insensitive to refractive index (RI) of bulk solution
and particle adsorption on the film surface. The sensor is only responsive to changes in RI of
the Teflon film. The Teflon AF 2400 film is highly hydrophobic, enabling to effectively
absorb nonpolar BaP molecules in water. Since BaP is a high-RI (n = 1.887) compound, its
enrichment in the Teflon film can result in a considerable increase of the film RI.
Consequently, the SPR sensor operating in the visible-near infrared reflection (NIR)
wavelength range can be used to detect very low concentration of BaP in water. According to
the simulation results, the thickness of the Teflon film should exceed 1000 nm to eliminate
the SPR sensitivity to RI of bulk solution. The experimental results indicate that the
resonance-wavelength shift (ΔλR) of the SPR sensor linearly increases with increasing the
BaP concentration from C = 20 nmol·L-1 up to 100 nmol·L-1. ΔλR is about 0.9 nm at C = 20
nmol·L-1, which is very close to the minimum ΔλR detectable with the CCD spectrometer
used. The resonance wavelength stabilized 6 seconds after the sample injection, indicating
that the diffusion of BaP molecules in the Teflon film is quite quick, which is attributable to
the nanoporous structure of the Teflon film. It is anticipated that the sensitivity of SPR sensor
to BaP and its detection limit can be further improved by optimization of the thickness of the
Teflon film.
Nanoporous gold film based SPR sensors for trace chemical detection
Dr. Li Wang, Xiaoqing Gong, Xiumei Wan, Dan-feng Lu, Zhi-mei Qi*
Institute of Electronics, Chinese Academy of Sciences, China
Thin films of nanoporous gold (NPG) have both localized and propagating surface plasmon
resonance (SPR) effects. The propagating SPR effect of NPG film combined with its huge
internal surface area makes it applicable as an evanescent wave sensor with high sensitivity.
In this work, NPG films with controlled thicknesses were fabricated on glass substrates by
sputtering deposition of AuAg films followed by dealloying in nitric acid. By using of the
NPG films as the sensing layer, a broadband wavelength-interrogated SPR sensor was
prepared for chemical and biological detection. The propagating SPR absorption band in the
visible-near infrared region was clearly observed upon exposure of the NPG film to air, and
this band was detected to move to longer wavelengths in response to adsorption of molecules
within the NPG film. Simulations based on Fresnel equations combined with Bruggeman
approximation were carried out for optimizing the propagating SPR property of NPG film.
The sensor’s performance was investigated using both bisphenol A (BPA) and lead (II) ions
as analytes. According to the experimental results, the detection limits of the sensor are 5
nmol·L-1 for BPA and 1 nmol·L-1 for lead (II) ions. The work demonstrated the outstanding
applicability of the NPG film based SPR sensor for sensitive environmental monitoring.
- 42 -
Measuring Dispersed Spot of positioning CMOS camera From Star Image Quantitative
Interpretation Based On A Bivariate- Error Least Squares Curve Fitting Algorithm
Assoc. Prof. Fan Bu, Yuehong Qiu, Dalei Yao, Xingtao Yan
Xi’an Institute of Optics and Precision Mechanics. CAS, China
For a positioning CMOS camera, we put forward a system which can measure quantitatively
dispersed spot parameters and the degree of energy concentration of certain optical system.
Based on this method, the detection capability of the positioning CMOS camera can be
verified. The measuring method contains some key instruments, such as 550mm collimator,
0.2mm star point, turntable and a positioning CMOS camera. Firstly, the definition of
dispersed spot parameters is introduced. Then, the steps of measuring dispersed spot
parameters are listed. The energy center of dispersed spot is calculated using centroid
algorithm, and then a bivariate-error least squares curve Gaussian fitting method is presented
to fit dispersion spot energy distribution curve. Finally, the connected region shaped by the
energy contour of the defocused spots is analyzed. The diameter equal to the area which is
80% of the total energy of defocused spots and the energy percentage to the 3×3 central area
of the image size are both calculated. The experimental results show that 80% of the total
energy of defocused spots is concentrated in the diameter of the inner circle of 15μm, and
the percentage to the 3×3 pixels central area can achieve 80% and even higher. Therefore, the
method meets the needs of the optical systems in positioning CMOS camera for the imaging
quality control.
Development and design of up-to-date laser scanning two-photon microscope using in
neuroscience
Mr. Maxim Doronin, Alexander Popov
Lobachevsky State University of Nizhny Novgorod, Russian Federation
Today one of the main areas of application of two-photon microscopy is biology. This is due
to the fact that this technique allows to obtain 3D images of tissues due to laser focus change,
that is possible due to substantially greater penetration depth on the main wavelength into
biological tissues. Self-developed microscopy system provides possibility to service it and
modify the structure of microscope depending on highly specialized experimental design and
scientific goals. This article may be regarded as a quick reference to laboratory staff who are
wishing to develop their own microscopy system for self-service and modernization of the
system and in order to save the lab budget.
Optical design and athermalization analysis of infrared dual band refractive-diffractive
telephoto objective
Dr. Dong Jianing, Zhang Yinchao, Chen Siying, Chen He, Guo Pan
Beijing Institute of Technology, China
In order to improve the remote target detection ability of infrared (IR) images effectively, an
infrared telephoto objective for 3μm~5μm and 8μm~12μm dual wave-band is designed for
640 pixel×512 pixel infrared CCD detector. The effects of the surrounding environmental
- 43 -
temperature are analyzed and the refractive diffractive hybrid thermal compensation is
discussed. The focal length of the system is 200mm, the relative aperture is 1:2.2 and the
field of view is 7°. The infrared dual band telephoto system with small volume and compact
structure is designed in a large range of temperature. The system is composed of four lenses
with only three materials of zinc sulfide, zinc selenide and germanium to compensate for the
temperature. The image quality of the system is evaluated by ZEMAX optical design
software. The results show that the modulation transfer function (MTF) for each field of view
at cut-off frequency of 17 lp/mm are respectively greater than 0.6 and 0.4 which approache
the diffraction limit. The telephoto objective has favorable performance at the working
temperature of -40℃~+60℃. The relative aperture, field of view, and focal length are same
for both spectral regions. The system meets the requirements of technical specification.
Study On Light Scattering Characterization For Subsurface Defect Of Optical Element
Prof. Tian Ailing, Zhang Yingge, Tian Yujun, and Wang Chunhui
Xi'an Technological University, China
Aiming at the effect of converge laser light scattering caused by subsurface microdefect, and
the change rule of laser scattering modulation was studied. First, the geometry model is built
by defect type; then, by finite element method based on electromagnetic theory, the scattering
light intensity distribution and variation curve with different detection defect depth, which
convergence light spot focus on, were researched by numerical simulation. Finally,
simulation model was verified by compare experiment. This research has theoretical guide to
setup the mathematical relation between subsurface defect and light scattering, and realize
quantitative detection for the subsurface defect of optical element.
Modeling of electronic power steering system for IKCO SAMAND vehicle and investigating
on it’s performance via CARSIM software
Esmail Haghgoo, Mohammad Zamani , Mr. Ali Sharbati
Shahid khodadadi collage of anzali , gilan , iran
The point of this article is introducing the usage of electronic power steering (ESP) system in
IKCO SAMAND vehicle and investigating on it’s benefit’s. Also the operation of electronic
steering system and it’s performance in IKCO SAMAND vehicle have been described. The
optimization of IC engine efficiency and it’s fuel consumption have been simulated via
ADVISOR software used in MATLAB software. Usually, mechanical steering systems and
hydraulic steering systems are producing inside IRAN that the mechanical types have not
accepted because of it’s too many disadvantages. The hydraulic steering systems, that have been
replaced with mechanical types , indeed have the same features with mechanical types but with a
difference which they have a hydraulic booster to facilitate the rotation of steering wheel. Beside
advantages in hydraulic systems, they are some disadvantages in this system that
one of the most important of them is reducing the output power of engine. To restore this power
dissipated, we use ESP systems. In this article output diagrams given by software, are showing
that IKCO SAMAND vehicle which equipped with ESP system , exerts less torque and power on
steering wheel. This improves the safety of driver and also performance of the vehicle at high
speeds and reduces fuel consumption beside increasing the efficiency of IC engine.
- 44 -
Session 1< Optics >
Venue: Homalayan A
Chair:
Time: 16:30-18:30
Note:
* The certification of Oral presentations, listeners, will be awarded at the end of each session.
* For the Best Presentation of each session, it is encouraged to award it to student author prior.
*To show the respect to other authors, especially to encourage the student authors, we strongly
suggest you attend the whole session, the scheduled time for presentations might be changed due to
unexpected situations, please come as early as you could.
* session photo will be taken at the end of the session and update online
Time: 16: 30-16:50
Beam Control and Power Scaling of Diode Lasers
Dr. Tong Cunzhu
Changchun Institute of Optics, Fine Mechanics and Physics (CIOMP),China
Diode lasers show many advantages including the high electro-optical efficiency, small
volume, low weight, long lifetime and low cost, but the disadvantages such as large
divergence, oval-shaped beam and the relative low-power as the direct source for
industry still affect their applications. In this talk, I will introduce our works on how to
control the beam shape, divergence in fast- and slow-axis of laser diodes using
photonic bandgap principle and microstructures. The power scaling of laser diodes
based on the beam shaping and combining approaches using the diffraction optical
elements is also given. The developing trends and the competition of direct diode lasers
with the solid state lasers and fiber lasers are also discussed.
Time: 16:50-17:10
Computational microscopy with programmable illumination and coded aperture
Dr. Chao Zuo
Department of Electronic and Optical Engineering, Nanjing University of Science and
Technology (NUST), China
Computational microscopy is an emerging technology which extends the capabilities of
optical microscopy with the combination of optical coding and computational
decoding. It provides us with novel imaging functionalities or improved imaging
performance which is difficult or impossible to achieve using a conventional
microscopic system. Recent advance in LED lighting and digital display technology
provide new opportunities for active digital illumination and imaging control for
advancing microscopy. In this talk, we report our most recent developments of
computational microscopy with programmable illumination and coded aperture. We
describe several new approaches for achieving multi-modal computational imaging,
including contrast-enhancement imaging, quantitative phase imaging, light field
imaging, giga-pixel high-resolution imaging and lens-less tomographic imaging, with
use of a programmable LED array or a programmable LCD panel.
- 45 -
Time: 17:10-17:25
Magnetic Manipulation of Terahertz Wavefront with Semiconductor Metasurface
Dr. Yongzheng Wen, Ji Zhou
Tsinghua University, China
Recently, numerous researches have proved the electromagnetic properties of
metasurface can be reconfigured with external signals, including the optical, electrical
and thermal. The effect of magnetostatic field on the metasurface, however, is relatively
lack of study. Here, a semiconductor metasurface potentially capable of manipulating
the wavefront of terahertz (THz) wave with the external magnetostatic field is
proposed. The magnetostatic field distributed on the metasurface spatially controls the
phase of the transmitted THz wave and determines the wavefront. The designed
metasurface is on a SiO2 substrate, consisting of an array with identical cut-wire
resonators made of doped InAs film, a semiconductor material presenting strong Hall
effect. With the existence of the external magnetostatic field, the surface currents driven
by the electric field of the incident THz radiation would drift due to the Lorentz force,
leading to apparent resonant frequency and phase shift in the THz transmission spectra.
With the magnetic flux densities varying from 0Gs to 3000Gs, the simulated resonant
frequency of the metasurface shifts from 2.25THz to 1.87THz. At the frequency of
2.00THz, the simulated phases increase from -181°to -89°. Therefore, with the proper
distribution of the megnetostatic field, the phase of the transmitted THz wave can be
spatially configured, and the THz wavefront can be manipulated effectively. Two
different distributions of the megnetostatic field were fashioned to the metasurface to
manipulate the THz wavefront. By examining the simulated electric field, it can be
observed that with the same illuminance of a plane wave at 2.00THz, the metasurface
distributed with linear-like magnetic field bend the THz wave to an angle about 10°,
while the one with the hyperbolic-like distribution focuses the plane wave with the
focal length of 0.5mm. The theoretical results fully verify the proposed magnetic
manipulation of THz wavefront with the metasurface.
Time: 17:25-17:40
The Application Analysis of the Multi-angle Polarization Technique for Ocean Color
Remote Sensing
Dr. Yongchao Zhang, Jun Zhu, Huan Yin, Keli Zhang
DFH Satellite Corporation Limited, China
The multi-angle polarization technique, which uses the intensity of polarized radiation
as the observed quantity, is a new remote sensing means for earth observation. With this
method, not only can the multi-angle light intensity data be provided, but also the
multi-angle information of polarized radiation can be obtained. So, the technique may
solve the problems, those could not be solved with the traditional remote sensing
methods. Nowadays, the multi-angle polarization technique has become one of the hot
topics in the field of the international quantitative research on remote sensing. In this
paper, we firstly introduce the principles of the multi-angle polarization technique, then
the situations of basic research and engineering applications are particularly
summarized and analysed in 1) the peeled-off method of sun glitter based on
polarization, 2) the ocean color remote sensing based on polarization, 3) oil spill
- 46 -
detection using polarization technique, 4) the ocean aerosol monitoring based on
polarization. Finally, based on the previous work, we briefly present the problems and
prospects of the multi-angle polarization technique used in China’s ocean color remote
sensing.
Time: 17:40-17:55
Application of EMD in Fringe analysis: New Developments
Dr. Chenxing Wang, Qian Kemao, Feipeng Da, Shaoyan Gai
Feipeng Da and Shaoyan Gai, school of automation, southest university, China
Empirical mode decomposition (EMD) based methods have been widely used in fringe
pattern analysis, including denoising, detrending, normalization, etc. The common
problem of using EMD and Bi-dimensional EMD is the mode mixing problem, which
is generally caused by uneven distribution of extrema. In recent years, we have
proposed some algorithms to solve the mode mixing problem and further applied these
methods in fringe analysis. In this paper, we introduce the development of these
methods and show the successful results of two most recent algorithms.
Time: 17:55-18:10
Research on Optical Measurement for Additive Manufacturing Surfaces
Dr. Cheng Fang, Fu Shaowei and Leong Yongshin
Advanced Remanufacturing and Technology Centre (Agency for Science, Technology
and Research, Singapore)
Surfaces made by Additive Manufacturing (AM) processes normally show higher
roughness and more complicated microstructures than conventional machined surfaces.
In this study, AM surface roughness measurements using both tactile and optical
techniques are analyzed, theoretically and experimentally. Analytical results showed
both techniques have comparable performance when measuring AM samples with good
surface integrity. For surfaces with steep features, coherence scanning interferometry
showed more reliable performance especially when peak-to-valley value was required.
In addition of the benchmarking study, development of a low-cost measurement system,
using laser confocal technology, is also presented in this paper. By comparing the
measurement results with those from a coherent scanning interferometer, accuracy
levels of the proposed system can be evaluated. It was concluded that with comparable
accuracy, the proposed low-cost optical system was able to achieve much faster
measurements, which would make it possible for in-situ surface quality checking.
Time: 18:10-18:25
Algorithms of wave reflective critical angle on interface
Prof. Zhang Yonggang, Zhang Jianxue, Jiao Lin and Li Qinghong,
Dalian Naval Academy, China
Helical gears are known for high load carrying capacity and reduced noise generation
characteristics. High speed will lead to increased dynamic loading, which is influential
on the gear performance and premature failure. However, predicting the gear response
- 47 -
under complex loading conditions becomes complicated, which leads to the need of
developing an experimental test to anticipate the gear performance at selected boundary
conditions. In the following paper, an experimental setup was developed with the aim to
measure gears misalignments, temperatures and vibrations under random and
fluctuating speeds. Consequently the effect of input variables can be inspected and the
gears performance can be improved by implementing design modification and
recommendations. Results showed that higher fluctuating speeds will affect
misalignments, as well as vibration amplitudes will increase. Furthermore measured oil
temperature varied with the speed increase which will lead to lower viscosity and
potential contact surface wear and gear premature.
- 48 -
Chair: Prof. Manuel Costa, University of Minho, Portugal
Venue: Homalayan B
13:30pm-15:30pm
Prof. Manuel Costa
13:30-14:00pm
University of Minho, Portugal
Plenary Speech
" 3D SURFACE INSPECTION AND REPRODUCTION "
Prof. Xiang Peng
14:00-14:30pm
14:30-15:00pm
Plenary Speech
15:00-15:30pm
Plenary Speech
15:30-16:30pm
Shenzhen University, China
Homalayan B
Plenary Speech
" 3D Imaging and modeling: a bridge from physical world to digital world "
Dr. ZHANG Yilei,
Nanyang Technological University, Singapore
" Development of DMD based non-diffraction beam shaping"
Prof. Yu-Lung Lo
Department of Mechanical Engineering, China
"
"
Coffee break & poster session
Note:
* The certification of Plenary, Poster presentations and listeners will be awarded at the end of session.
* For the Best Presentation of poster session, it is encouraged to award it to student author prior.
*To show the respect to other authors, especially to encourage the student authors, we strongly suggest you
attend the whole session, the scheduled time for presentations might be changed due to unexpected situations,
please come as early as you could.
- 49 -
Poster Session
Venue: Homalayan B
Time: 15:30-16:30pm
Note:
* The certification of Poster presentations, listeners, will be awarded at the end of each session.
* For the Best Presentation of each session, it is encouraged to award it to student author prior.
*To show the respect to other authors, especially to encourage the student authors, we strongly suggest you
attend the whole session, the scheduled time for presentations might be changed due to unexpected situations,
please come as early as you could.
The Characteristic Research of RF Discharge in He-Ne laser
Mr. Zhang Xin, Lu Guangfeng, Fan Zhenfang, Luo Hui
NUDT, China
The performance of radio frequency (RF) exciting He-Ne laser is exposed. This text sets out
from kinetics property of the electronics inside the high-frequency, aiming at getting the
relationship between radio frequency and plasma energy. In order to study the frequency
characteristic of RF excitation in He-Ne laser, the frequency ranging from 300MHz to
700MHz is chose to test the discharge property of active medium. It also obtains the optimal
RF frequency (432MHz) through experiment, which is important to the improved design of
RF exciting He-Ne laser.
Adaptive Cylindrical Lens Array for 2D/3D Switchable Display
Assoc. Prof. Wuxiang Zhao, Huan Deng and Qionghua Wang
Sichuan University, China
An adaptive Cylindrical Lens Array (ACLA) for a 2D/3D switchable display is
demonstrated. The ACLA is based on two transparent liquids of different refractive indexes
and an elastic membrane. Driving these two liquids to flow can change the shape of the
elastic membrane as well as the focal length. In this design, the gravity effect of liquid can be
overcome. An ACLA demo for the 2D/3D switchable display is developed. The experimental
result shows that the ACLA demo works as a light splitting and 2D/3D switching component
of the 2D/3D switchable display effectively and the 2D/3D switchable display is realized.
Effect of oil liquid viscosity on hysteresis in double-liquid variable-focus lens based on
electrowetting
Mr. Zeng zhi, Peng Runling, and He Mei
University of Shanghai for Science and Technology, China
The double-liquid variable-focus lens based on the electrowetting has the characteristics of
small size, light weight, fast response, and low price and so on. In this paper, double-liquid
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variable-focus lens’s Principle and structure are introduced. The reasons for the existence and
improvement of contact angle hysteresis are given according improved Young’s equation. At
last, 1-Bromododecane with silicone oil are mixed to get oil liquid with different viscosity
and proportion liquid as insulating liquid. External voltages are applied to these three liquid
lens and focal lengths of the lenses versus applied voltage are investigated. Experiments
show that, the decreasing of oil liquid viscosity can reduce focal length hysteresis.
Recent progress on gas sensor based on quantum cascade lasers and hollow fiber waveguides
Mr. Ningwu Liu, Juan Sun, Hao Deng, Jingsong Li*
Anhui University, China
Mid-infrared laser spectroscopy provides an ideal platform for trace gas sensing applications.
Despite this potential, early MIR sensing applications were limited due to the size of the
involved optical components, e.g. light sources and sample cells. A potential solution to this
demand is the integration of hollow fiber waveguide with novelty quantum cascade
lasers.Recently QCLs had great improvements in power, efficiency and wavelength range,
which made the miniaturized platforms for gas sensing maintaining or even enhancing the
achievable sensitivity conceivable. So that the miniaturization of QCLs and HWGs can be
evolved into a mini sensor, which may be tailored to a variety of real-time and in situ
applications ranging from environmental monitoring to workplace safety surveillance. In this
article, we introduce QCLs and HWGs, display the applications of HWG based on QCL gas
sensing and discuss future strategies for hollow fiber coupled quantum cascade laser gas
sensor technology.
Synchronous high-speed multi-point velocity profile measurement by heterodyne
interferometry
Ms. Xueqin Hou, Wen Xiao, Zonghui Chen, Xiaodong Qin, Feng Pan*
Beijing University of Aeronautics and Astronautics, China
This paper presents a synchronous multipoint velocity profile measurement system, which
acquires the vibration velocities as well as images of vibrating objects by combining optical
heterodyne interferometry and a high-speed CMOS-DVR camera. The high-speed
CMOS-DVR camera records a sequence of images of the vibrating object. Then, by
extracting and processing multiple pixels at the same time, a digital demodulation technique
is implemented to simultaneously acquire the vibrating velocity of the target from the
recorded sequences of images. This method is validated with an experiment. A piezoelectric
ceramic plate with standard vibration characteristics is used as the vibrating target, which is
driven by a standard sinusoidal signal.
Quantum cascade laser based sensor for open path measurement of atmospheric trace gases
Mr. Hao Deng, Juan Sun, Ningwu Liu and Jingsong Li
Anhui University, China
A sensitive open-path gas sensor employing a continuous-wave (CW) distributed feedback
(DFB) quantum cascade laser (QCL) and direct absorption spectroscopy (DAS) was
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demonstrated for simultaneously measurements of atmospheric CO and N2O. Two
interference free absorption lines located at 2190.0175 cm-1 and 2190.3498 cm-1 were
selected for CO and N2O concentration measurements, respectively. The Allan variance
analysis technique was performed to investigate the long-term performance of the QCL
sensor system. The results indicate that a detection limit of 9.92 ppb for CO and 7.7 ppb for
N2O with 1-s integration time were achieved, which can be further improved to 1.5 ppb and
1.1 ppb by increasing the average time up to 80 s.
Analysis on the Misalignment Errors between Hartmann-Shack Sensor and 45-element
Deformable Mirror
Mr. Liu Lihui, Zhang Yi, Tao Jianjun, Cao Fen, Long Yin, Tian Pingchuan, Chen Shangwu
Northwest Institute of Nuclear Technology, Xi’an, shanxi 710024, China
Aiming at 45-element adaptive optics system, the model of 45-element deformable mirror is
truly built by COMSOL Multiphysics, and every actuator’s influence function is acquired by
finite element method. The process of this system correcting optical aberration is simulated
by making use of procedure, and aiming for Strehl ratio of corrected diffraction facula, in the
condition of existing different translation and rotation error between Hartmann-Shack sensor
and deformable mirror, the system’s correction ability for 3-20 Zernike polynomial wave
aberration is analyzed. The computed result shows: the system’s correction ability for 3-9
Zernike polynomial wave aberration is higher than that of 10-20 Zernike polynomial wave
aberration. The correction ability for 3-20 Zernike polynomial wave aberration does not
change with misalignment error changing. With rotation error between Hartmann-Shack
sensor and deformable mirror increasing, the correction ability for 3-20 Zernike polynomial
wave aberration gradually goes down, and with translation error increasing, the correction
ability for 3-9 Zernike polynomial wave aberration gradually goes down, but the correction
ability for 10-20 Zernike polynomial wave aberration behave up-and-down depression.
Determination of water pH using absorption-based optical sensors: evaluation of different
calculation methods
Dr. Hongliang Wang, Baohua Liu, Zhongjun Ding, Xiangxin Wang
National Deep Sea Center, State Oceanic Administration, Qingdao 266237, China
Absorption-based optical sensors have been developed for the determination of water pH. In
this paper, based on the preparation of a transparent sol–gel thin film with a phenol red (PR)
indicator, several calculation methods, including simple linear regression analysis, quadratic
regression analysis and dual-wavelength absorbance ratio analysis, were used to calculate
water pH. Results of MSSRR show that dual-wavelength absorbance ratio analysis can
improve the calculation accuracy of water pH in long-term measurement.
Selection of F/number in lattice design for stitching interferometry of aspheric surface
Dr. Junzheng Peng, Xiaoli Liu, Xiang Peng, Yingjie Yu, and Xiaoge Li
College of Optoelectronic Engineering, Shenzhen University, China
Subaperture stitching interferometry has been proven to be a promising method for precision
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metrology of aspheric surfaces. However, due to the aspheric departure, selection of
F/number of the transmission sphere for aspheres is more complicated than spheres or flats.
This paper proposed an optimization method to determine the maximum subaperture width
based on the slope resolution of the standard interferometer. With it, the transmission sphere
is selected with an optimal F/number. On the basis of the transmission sphere and overlap
rate, we not only can ensure the fringes of off-axis subapertures are resolvable by the
interferometer, but also can minimize the number of subapertures required to cover the full
aperture of the surface. Finally, some numerical examples are given to illustrate the
procedure, and also to verify the validity of our proposed method.
Portable 3D scanning system based on an inertial sensor
Dr. Qijian Tang, Xiang Peng, Xiaoli Liu, Zewei Cai
Shenzhen University, Shenzhen, China
Portable 3D scanning systems are increasingly used in many applications at present as a
result of its high flexibility, portability and high efficiency. Iterative closest points method is
widely used for multi-view measurement results registration. However, there are many
restrictions for portable system, the alignment often depends on landmarks on object surface
or object features, in some applications, it may not achieve satisfactory expectations. In this
paper, we propose to conduct the registration based on pose estimation from a low cost
inertial sensor, which will increase the measurement effectiveness. Test result demonstrates
that the method is feasible. With attitude information inside the system, the measurement
device does not need external support information and has good prospects for application.
Non-Contact Gas Leakage Detection of Tank Based om Low-Coherence Optical Fiber
Interferometer
Mr. Xiaoguang Wang, Shenglai Zhen, Xinxin Li and Benli Yu
Anhui University, China
In this paper, a method for non-contact detecting the acoustic signal of tank gas leakage
based on low-coherence optical fiber interferometer is presented. Vibration signals which
caused by acoustic field of gas leakage are detected by low-coherence interference. The
experimental results show that the vibration signals are wideband signals (0 Hz~90 KHz).
While increasing the internal pressure, high-frequency components of the frequency
spectrum have an obvious increasing trend, the amplitude and energy of the acoustic signal
will both increase. The minimum detectable internal pressure of tank is 0.12MPa. The sensor
is simple and reliable, and has a good practicability.
In-depth analysis and discussions of water absorption-typed high-power laser calorimeter
Assoc. Prof. Ji Feng Wei
Institute of Applied Electronics，China Academy of Engineering Physics, China
In high-power and high-energy laser measurement, the absorber materials can be easily
destroyed under long-term direct laser irradiation. In order to improve the calorimeter's
measuring capacity, a measuring system directly using water flow as the absorber medium
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was built. The system's basic principles and the designing parameters of major parts were
elaborated. The system's measuring capacity, the laser working modes, and the effects of
major parameters were analyzed deeply. Moreover, the factors that may affect the accuracy
of measurement were analyzed and discussed. The specific control measures and methods
were elaborated. The self-calibration and normal calibration experiments show that this
calorimeter has very high accuracy. In electrical calibration, the average correction
coefficient is only 1.015, with standard deviation of only 0.5%. In calibration experiments,
the standard deviation relative to a middle-power standard calorimeter is only 1.9%.
Recent Progress in Making Protein Microarray through BioLP
Mr. Yang Rusong, WeiLian, and FengYing
College of Opto-electronics Science and Engineering, National University of Defense
Technology, China
Biological laser printing (BioLP) is a promising biomaterial printing technique. It has the
advantage of high resolution, high bioactivity, high printing frequency and small transported
liquid amount. In this paper, a set of BioLP device is design and made, and protein
microarrays are printed by this device. It’s found that both laser intensity and fluid layer
thickness have an influence on the microarrays acquired. Besides, two kinds of the fluid layer
coating methods are compared, and the results show that blade coating method is better than
well-coating method in BioLP. A microarray of 0.76pL protein microarray and a “NUDT”
patterned microarray are printed to testify the printing ability of BioLP.
Adaptive Depth Imaging Method Based on Photon Counting LIDAR
Weiji He, Mr. Zhenchao Feng, Jie Lin, Shanshan Shen, Qian Chen, Guohua Gu and Beibei
Zhou
Nanjing University of Science and Technology, China
For an unknown characteristic target scene, the laser radar system that uses single-photon
detector cannot directly estimate the dwell time of every pixel. Therefore, as the difference of
target reflectivity, depth estimation appears inadequate sampling or redundant sampling in
the conventional imaging method of maximum likelihood estimation (MLE-CIM). In this
work, an adaptive depth imaging method (ADIM) is presented. ADIM is capable to obtain
the depth estimation of target and adaptively decide the dwell time of each pixel. The
experimental results reveal that ADIM can accuratelyobtainthe3Ddepthimageoftarget
evenatthecondition oflowsignal-to-noiseratio.
Measurement of the light scattering of single and two particles captured with a microfluidic
trap
Huimin Wang, Kecheng Yang, Baoyu Gong, Dekun Liu, Jie Dai, Long Yu and Assoc. Prof.
Min Xia
Huazhong University of Science and Technology, China
We have developed a novel light scattering measurement system based on a microfluidic trap
to measure the elastic light scattering of micro-particles. The particles were captured from the
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sample suspension by a microfluidic chip with a hydrodynamic trapping, which were stably
immobilized at the predetermined position by the pressure gradient and friction in the
micro-channel. The trapped particles were illuminated by a He-Ne laser after refractive index
matching, and a narrow-field photodetector designed by the spatial filter and a
photomultiplier mounted on a homocentric rotating platform was used to detecting the
scattering light. In this paper, we have improved this measurement system. By reducing the
background scattering of microfluidic chip to improve the signal-noise ratio and using
precise control, we measured the 23.75μm diameter polystyrene microsphere’s light
scattering distribution, the results showed a good agreement on the trend with the curves of
theoretical result. At the same time, using the microfluidic trap, we captured two particles
(same size and different size) in a fixed orientation with touching components and obtained
the light scattering distribution
Laser absorption spectroscopy based on a broadband external cavity quantum cascade laser
Ms. Juan Sun, Ningwu Liu, Hao Deng, Jingsong Li*
Key Laboratory of Opto-Electronic Information Acquisition and Manipulation of Ministry of
Education, Anhui University, China
A tunable diode laser absorption spectroscopy (TDLAS) system based on a broad band
external cavity quantum cascade laser (ECQCL) near 7.78 μm was used to study volatile
organic compounds (VOCs) measurements. Instead of using a standard infrared mercury
cadmium telluride (MCT) detector, a quartz crystal tuning fork (QCTF) as a light detector
was successfully used for laser signal detection. Fast Fourier transform (FFT) was used to
extract vibration intensity information of QCTF. Primary results indicate that the new
developed system has a good reproducibility, and a good agreement was obtained by
comparing with data taken from standard spectroscopic database.
Study on MMW radiation characteristics and imaging of aquatic plants for environmental
application
Ms. Luyan Zhou, Guangfeng Zhang and Jing Liu
Nanjing University of Science and Technology, China
Working all-day and all-weather, the passive millimeter wave radiometer is widely used in
remote sensing, guidance and other fields. In order to solve the increasingly serious problem
of water pollution, especially the pollution caused by the rapidly breed of the aquatic plants,
a simple and effective method to monitor the water environment is proposed. Aquatic plants
can be distinguished through millimeter wave system, as they have high bright temperature
compared to Water. The 8mm radiometer is used to measure the radiation characteristics of
aquatic plants and image. The simulation results and radiation imaging experiments prove the
feasibility and effectively of monitoring aquatic plants by millimeter wave radiometer. This
study will contribute to monitoring the aquatic plants growth and decreasing the pollution.
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Numerical simulation of waveform reconstruction based on the Distribution Feedback
Bragg fiber laser
Mr.Junfeng Zhou,Shuang Wu,Dehui Wang,Chenchen Wang,Hao Deng,Li Sun,Liang Lu*
Anhui University, China
In this paper, we presented a waveform reconstruction method based on the self-mixing
interference of DFB fiber laser by phase modulating technique , which is superior to the
traditional vibration measurement system due to the wider measurement range and higher
accuracy. In our sinusoidal phase modulation technology,the vibration information of the
external target is extracted by the Fourier transformation method. For restoring the
micro-vibration of the external target effectively with high precision,theoretical analysis and
numerical simulations of phase modulation method based on the Distribution Feedback
Bragg fiber laser are introduced in detail.
Measurement of the Absolute Distance inside an All Fiber DBR Laser by Self-mixing
Technique
Mr. Dehui Wang, Junfeng Zhou, Chenchen Wang, Jingang Wang, Hao Deng, Liang Lu*
Anhui University, China
A method for the measurement of the absolute distance based on wavelength tuning
technology of DBR fiber laser is presented. Experimental results show that the fringe number
of the self-mixing signal and the target distance can reach a good linear relationship which
agreed with the simulation results well. This paper demonstrate that DBR fiber laser present
a powerful tool for the self-mixing technique and provide measurement of the distance up to
3.33 meters.
Experimental Study on Imaging of Underwater Microbubbles through Supercavity Laye
Luo Tao, She Yajun, Yang Zongyuan, Assoc. Prof. Xia Min, Xiao Xiao
Huazhong University of Science and Technology, China
In order to figure out how changes in equipment and environment impact the imaging result
and find out a best imaging condition, in this paper, microbubbles with micron diameter is
detected and imaged through a simulated supercavity layer in laboratory. After the image
processing, the result shows the changes in distance of bubble region affect the imaging little.
When the detection angle is 90 degrees, the bubbles have the clearest imaging. And the
growth of bubble number in imaging is increasing with current and reaching saturation at a
constant value, and the smaller the diameter of bubble is, the higher sensitivity towards
current has.
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Supercontinuum generation in highly nonlinear low-dispersion photonic crystal fiber
Assoc. Prof. Qiang Xu, Miao Wang, Yani Zhang
Baoji University of Arts and Science, Baoji 721016, PR China
We proposed a new structure of highly nonlinear low- dispersion photonic crystal fiber.
Numerical results show that the dispersion variation is within ± 0.7 ps·km-1·nm-1 in the C
band, and the corresponding nonlinear coefficient is 60.5 60.5 W-1·km-1. With the 6 W peak
power of the input pulse, and PCF with 800 m length generates a SC with a spectrum ranging
from 1500 to 1800 nm.
The characteristic of reference beam laser Doppler signal of solid-state surface
Mr. Qiucheng Gong, Jian Zhou, Bin Zhang
National University of Defense Technology, China
In the designed reference beam laser Doppler velocimeter (LDV) for the vehicle
self-contained navigation system, the reference object is a kind of solid-state surface. This
paper expounded the generation mechanism of reference beam laser Doppler signal of this
solid-state surface according to the order of the speckle field intensity variation. The
expression of reference beam laser Doppler signal intensity of solid-state surface is derived
based on the theory of speckle and stochastic process. Results of theory and experiments
show that the essence of reference beam laser Doppler signal of solid-state surface is the
coherence stack of two speckles. The signal intensity is directly proportional to the diameter
of the photosensitive surface of detector and is inversely proportional to the diameter of laser
spot on ground.
Surface quality inspection of laser gyro mirrors using digital holographic microscopy
Ms. Lizi Yang, Feng Pan, Wen Xiao*, Runyu Cao
Beihang University, China
In the development and production process of laser gyros, reflective mirrors have always
been a core component, as they are directly related to the performance of laser gyros.
Besides, surface profile deviation and surface defects of mirrors may lead to irreversible
serious damages to gyros. In order to achieve effective three-dimensional (3D) quantitative
measurements of their surface profiles and defects, we adopt digital holographic microscopy
(DHM). Using a DHM system with multiple magnifications and the aberration compensation
method, we obtained 3D profile images and estimated the precise quantitative sizes of not
only a profile with an aperture of 6.41 mm and a curvature radius of 8.39 m, but also a
scratch with a line-equivalent width of 0.45μm and an equivalent depth of 137.28 nm and a
pit with an equivalent diameter of 0.86μm and an equivalent depth of 42.95 nm. These results
demonstrate that the method is feasible and effective to meet the requirements of engineering
practice.
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Study of Imaging Fiber Bundle Coupling Technique in IR System
Mr. Chen Guoqing, Yang Jianfeng, Yan Xingtao, and Song Yansong
Xi’an Institute of Optics and Precision Mechanics of Chinese Academy of Science, China
Due to its advantageous imaging characteristic and banding flexibility, imaging fiber bundle
can be used for line-plane-switching push-broom infrared imaging. How to precisely couple
the fiber bundle in the optics system is the key to get excellent image for transmission. After
introducing the basic system composition and structural characteristics of the infrared
systems coupled with imaging fiber bundle, this article analysis the coupling efficiency and
the design requirements of its relay lenses with the angle of the numerical aperture selecting
in the system and cold stop matching of the refrigerant infrared detector. For an actual need,
one relay coupling system has been designed with the magnification is -0.6, field of objective
height is 4mm, objective numerical aperture is 0.15, which has excellent image quality and
enough coupling efficiency. In the end, the push broom imaging experiment is carried out.
The results show that the design meets the requirements of light energy efficiency and image
quality. This design has a certain reference value for the design of the infrared fiber optical
system.
An improved estimation transmission method for Dark Channel Prior
Mr.Tao Zhang, *Liangchao Li, Ronghua Mo
School of Physics and Optoelectronic Engineering, Xidian University, Xi'an 710071, China
Many studies have been made in refine transmission to improve the de-haze quality.
Compared by several common method of refine transmission, we present an improved refine
transmission method of secondary filter to improve halo effect in this paper. Halo effect area
is determined by the difference between the estimate transmission and the transmission
refined by guided filter. The transmission which is refined by guided filter in halo effect area
is replaced by the transmission refined by median filter. Using this method, the too high
transmission in halo effect area will be refined. The refine transmission method present by
this paper which combine the advantages of median filter algorithm and the guided filter
algorithm. This method can avoid black spots caused by median filter algorithm and halo
effect residues caused by guided filter algorithm.
Development and design of up-to-date laser scanning two-photon microscope using in
neuroscience
Mr. Maxim Doronin, Alexander Popov
Lobachevsky State University of Nizhny Novgorod, Russian Federation
Today one of the main areas of application of two-photon microscopy is biology. This is due
to the fact that this technique allows to obtain 3D images of tissues due to laser focus change,
that is possible due to substantially greater penetration depth on the main wavelength into
biological tissues. Self-developed microscopy system provides possibility to service it and
modify the structure of microscope depending on highly specialized experimental design and
scientific goals. This article may be regarded as a quick reference to laboratory staff who are
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wishing to develop their own microscopy system for self-service and modernization of the
system and in order to save the lab budget.
Round-robin differential-phase-shift quantum key distribution in wavelength-multiplexed
fiber channel
Mr. Bingpeng Li
Nanjing Political College Shanghai Branch, China
Realizing long-distance quantum key distribution (QKD) in fiber channel where classical
optical communications and quantum signals are multiplexed by their different wavelengths
has attracted considerable attentions. The achievable secure distance of commonly-used
Bennet-Brassard 1984 (BB84) protocol is lowered severely due to inevitable cross-talk from
classical optical pulses. Unlike conventional quantum key distribution (QKD) protocols,
round-robin differential-phase-shift (RRDPS) QKD protocol has a high tolerance for noise,
since the potential information leakage in this protocol can be bounded without monitoring
signal disturbance. Thus it may be a promising protocol under noisy channel. In this work we
investigate the performance, e.g., achievable secure distance of RRPDS protocol, when
cross-talk from classical communication is considered. Surprisingly, we find that RRPDS
only has quite limited advantage over BB84 protocol when optical misalignment of QKD
system is serious. If misalignment is trivial, BB84 can even outperform RRDPS protocol.
A Research On Modeling And Identification For GMA Based On Bragg Grating Sensors
Han Ping, Mr. Shi BingQing, and Liu quan
Wuhan University of Technology , China
In this paper, a new means of measuring the displacement of GMA (Giant Magnetostrictive
Actuator) is proposed based on FGB (Fiber Bragg Grating) sensor, experimental results
confirmed that FGB sensor can measure the displacement of GMA in different frequencies and
achieve good results. In addition a modified Bouc-Wen model is presented to describe the GMA,
the proposed model can describe the asymmetric hysteresis of GMA from 1 Hz to 100 Hz well,
and DE(Differential Evolution) algorithm is used for adaptive identification of the GMA system,
the algorithm has fast convergence and high accuracy. Finally, it verifies that the identification
model fits the experimental data well.
Research on virtual pinhole parameters optimization in laser differential confocal theta
microscope
Ms. Xiangye Zhao, Yun Wang, Lirong Qiu, Weiqian Zhao, and Ke Zhu
Beijing Institute of Technology, China. Ke Zhu, Chinese Academy of Sciences, China
Differential confocal theta microscope (DCTM) which has high axial resolution, provides a
feasible tool for precise measurement. The virtual pinhole detection technology can
significantly simplify the optical path alignment, and enhance imaging quality of the system
by optimizing virtual pinhole parameters. Based on the imaging principle of DCTM, a new
method for automatic adjusting and optimizing virtual pinhole parameters is presented
according to the position and size of the imaging spot, which eliminate the influence caused
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by the deformation and shifting of imaging spot and ensure the axial resolution. The
theoretical analyses and experimental results show that optimizing virtual pinhole parameters
can guarantee the axial resolution and signal-to-noise ratio as well as effectively improve the
imaging quality of DCTM.
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Session 2< Optics >
Venue: Homalayan B
Chair:
Time: 16:30-18:30
Note:
* The certification of Oral/Poster presentations, listeners, will be awarded at the end of each session.
* For the Best Presentation of each session, it is encouraged to award it to student author prior.
*To show the respect to other authors, especially to encourage the student authors, we strongly
suggest you attend the whole session, the scheduled time for presentations might be changed due to
unexpected situations, please come as early as you could.
* session photo will be taken at the end of the session and update online
Time: 16: 30-16:50
Compressive Holographic Tomography
Prof. Yingjie Yu
Lab. of Applied Optics and Metrology, Dept. of Precision Mechanical Engineering,
Shanghai University, China
Holographic recording is the process of compressing signal from three dimensional
data to two dimensional data. Each pixel in the hologram contains the information of
every single point in the three-dimensional object. Theoretically, it has a large amount
of redundant information. Compressive sensing can restore the original signal from a
small amount of measurement data accurately or with high-probability, and meanwhile
realize data reconstruction from low dimension to high dimension. Thereby it can
realize tomographic reconstruction of three-dimensional object from small amount of
holographic data. Therefore, more attention is gradually paid to digital holographic
tomography based on compressive sensing. After analyzing the domestic and overseas
research status and the existing problems of this technology, related theoretical analysis
and experimental research for different holographic recording system are carried out,
which focus on the method, the quality and the axial resolution of digital holographic
tomographic reconstruction based on compressive sensing.
Time: 16:50-17:10
Advanced Moire techniques for crack and structural health monitoring
Dr. Qinghua Wang
National Institute of Advanced Industrial Science and Technology, Japan
In optical metrology, Moire techniques are mature but still growing for deformation
measurements from the nanoscale to the kilometer scale. A commonality exists in
different Moire techniques using a microscope or an imaging sensor at different scales
pointed out in this talk. Several typical Moire techniques including the microscope
scanning Moire method and the sampling Moire method combined with a temporal or
spatial phase-shifting technique are introduced. Slight variation of the used working
distance under a laser scanning microscope is found to bring a nonnegligible error on
microscale strain, and we suggest to record 2D scanning moiré fringes for accurate
strain measurement to make the error less than 100 με. The latest development of
advanced Moire techniques and applications are presented in full-field displacement
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and strain measurements of materials especially composite materials. Distributions of
x-direction, y-direction, shear and principal strains are employed to predict the
microscale crack occurrence successfully. Dynamic deflections of bridges under
different fast-passed automobiles are accurately determined for structural health
monitoring. A perfect combination between the scanning and sampling Moirémethods
provide an effective way for high-sensitivity and high-accuracy deformation
measurement in a large field of view.
Time: 17:10-17:25
Monte Carlo model of Light transport in multi-layered tubular organs
Dr. Yunyao Zhang, Jingping Zhu, Ning Zhang
Xi’an Jiaotong University, China
We present a Monte Carlo static light migration model (Endo-MCML) to simulate
endoscopic optical spectroscopy for tubular organs such as esophagus and colon. The
model employs multi-layered hollow cylinder which emitting and receiving light both
from the inner boundary to meet the conditions of endoscopy. Inhomogeneous sphere
can be added in tissue layers to model cancer or other abnormal changes. The 3D light
distribution and exit angle would be recorded as results. The accuracy of the model has
been verified by Multi-layered Monte Carlo(MCML) method and NIRFAST. This
model can be used for the forward modeling of light transport during endoscopically
diffuse optical spectroscopy, light scattering spectroscopy, reflectance spectroscopy and
other static optical detection or imaging technologies.
Time: 17:25-17:40
Tunable Photonic Crystal Switch Based on Ring Resonators with Improved Crosstalk
and Q-factor
Massoudi Radhouene, Najjar Monia, Prof. Vijay Janyani
Malaviya National Institute of Technology Jaipur (INDIA)
In this paper, the proposed switch of T-type based on photonic crystal ring resonator has
been studied. The proposed structure is composed of two waveguides, between them
the photonic crystal ring resonator is placed. Our structure can switch two wavelengths
together following an external effect. The proposed design has a simple geometric
shape, therefore it is capable to realize optical switch applicable to photonic integrated
circuits. The parameters that can characterized the performance of optical device are
quality factor, crosswalk and foot print. The values of crosstalk, quality factor and
footprint that have been obtained are –
which are superior to earlier reported values. The finite different time domain (FDTD)
and plane wave extended (PWE) methods are used to calculate the outputs spectrum
and band gap, respectively.
Time: 17:40-17:55
Design and Implementation of a Cloud Based Lithography Illumination Pupil
Processing Application
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Assoc. Prof. Youbao Zhang, Xinghua Ma, Jing Zhu, Fang Zhang, Huijie Huang
Shanghai Institute of Optics and fine Mechanics, Chinese Academy of Sciences, China
Pupil parameters are important parameters to evaluate the quality of lithography
illumination system. In this paper, a cloud based full-featured pupil processing
application is implemented. A web browser is used for the UI (User Interface), the
websocket protocol and JSON format are used for the communication between the
client and the server, and the computing part is implemented in the server side, where
the application integrated a variety of high quality professional libraries, such as image
processing libraries libvips and ImageMagic, automatic reporting system latex, etc., to
support the program. The cloud based framework takes advantage of server’s superior
computing power and rich software collections, and the program could run anywhere
there is a modern browser due to its web UI design. Compared to the traditional way of
software operation model: purchased, licensed, shipped, downloaded, installed,
maintained, and upgraded, the new cloud based approach, which is no installation, easy
to use and maintenance, opens up a new way. Cloud based application probably is the
future of the software development.
Time: 17:55-18:10
Phase-coding fringe projection with multiple subzones for absolute phase measurement
Yi. Xing, C. Quan, C. J. Tay, Ms. Xing Yidan
Department of Mechanical Engineering, National University of Singapore, 9
Engineering Drive 1, Singapore 117576
Phase-coding method identifies absolute fringe order for each sinusoidal fringe and
obtains absolute phase in digital fringe projection profilometry. However, the number of
absolute fringe orders that can be identified is limited due to phase noise. In this paper,
a phase-coding method with multiple subzones is proposed to identify a larger number
of absolute fringe orders without the need to project extra patterns. In the proposed
method, two sets of projection patterns are employed: one is sinusoidal fringe patterns
to extract wrapped phase, the other is phase-coding fringe patterns to create codewords.
The codewords consist of multiple subzones and every subzone contains N unique
codewords. Although each sinusoidal fringe corresponds to a codeword, only within
N consecutive sinusoidal fringes are the codewords unique. This property is essential
in the identification of absolute fringe orders. The wrapped phase map is firstly made
use of to estimate range of fringe order, which has an interval not larger than N . Then
the absolute fringe order within the range can be identified based on the codeword.
Experiment shows that the phase-coding method with multiple subzones works well in
identifying a large number of absolute fringe orders without using extra patterns even
when the measured object has step-height surface discontinuities.
Time: 18:10-18:25
Experimental research of dynamic stitching interferometry for large plano optics
Mr. Xin Wu, Te Qi , Yingjie Yu
Department of Precision Mechanical Engineering, Shanghai University, Shanghai
200072, China
Stitching interferometry has been implemented in the laboratorial environment, but
rarely in workshop. In order to improve the testing efficiency in workshop, stitching
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interferometry could be combined with in-situ testing. A dynamic interferometer system
is established in this paper, which contains dynamic interferometry, precision motion
control and advanced stitching algorithm. This system has been prepared for the in-situ
testing of large plano optics. Many repetitive experiments have been proved the well
reliability of the system and method.
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Chair: Prof. Anand Krishna Asundi, School of Mechanical & Aerospace Engineering,
Nanyang Technological University, Singapore
Venue: Homalayan Hall
9:00am-11:40am
Prof. Anand Krishna Asundi
9:00-9:05am
School of Mechanical & Aerospace Engineering, Nanyang Technological University,
Opening Remarks
Singapore
Prof. Perry Shum
9:05-9:50am
School of EEE, Nanyang Technological University, Singapore
Keynote Speech
Plenary Speech
10:20-10:40am
Homalayan Hall
9:50-10:20am
" Optical Fibre-Based Technologies and Their Applications "
Dr. Leslie L. Deck
Zygo Corporation, USA
“Modern high precision interferometric testing of optical components”
Coffee Break & Group Photo
Dr. Fengzhou Fang
10:40-11:10am
Tianjin University, China
Plenary Speech
Dr. Yang Yu
11:10-11:40am
Plenary Speech
Taylor Hobson Ltd, UK
" Fast and precise 3D form error characterisation of aspheric optics "
*The Group Photo will be updated online.
**One best presentation will be selected from each session, the best one will be announced at the end of each
session and awarded certificate during the dinner, and the winners’ photos will be updated online.
***Best Presentation will be evaluated from: Originality; Applicability; Technical Merit; PPT; English.
****Please arrive at the conference room 10 minutes earlier before the session starts, copy your PPT to the
laptop.
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SPC Competition I< Metrology >
Venue: Homalayan A
Chair:
Time: 13:00pm-15:40pm
Note:
*Competition Opening Remarks
Chair:
*Evaluation: professional judges will score it and select the First, Second, Third, and Individual prize.
Trophies and certificates will be awarded at the dinner banquet.
*The certification of Oral presentations will be awarded at the end of each session.
*To show the respect to other authors, especially to encourage the student authors, we strongly
suggest you attend the whole session, the scheduled time for presentations might be changed due to
unexpected situations, please come as early as you could.
* Competition group photo will be taken at the end of the session and updated online.
Time: 13:10-13:25
3-D shape measurement system developed on mobile platform
Mr. Zhoujie Wu, Meng Chang, Bowen Shi and Qican Zhang
Sichuan University, China
3-D shape measurement technology based on structured light has become one hot research
field inspired by the increasing requirements. Many methods have been implemented and
applied in the industry applications, but most of their equipments are large and complex,
cannot be portable. Meanwhile, the popularity of the smart mobile terminals, such as smart
phones, provides a platform for the miniaturization and portability of this technology. The
measurement system based on phase-shift algorithm and Gray-code pattern under the
Android platform on a mobile phone is mainly studied and developed, and it has been
encapsulated into a mobile phone application in order to reconstruct three-dimensional (3-D)
shape data in the employed smart phone easily and quickly. The experimental results of two
measured object are given in this paper and demonstrate the application we developed in the
mobile platform is effective.
Time: 13:25-13:40
Multi-view phase unwrapping with composite fringe patterns
Mr. Tianyang Tao, Qian Chen, Yuzhen Zhang, Yan Hu, Jian Da and Chao Zuo
Nanjing University of Science and Technology, China
We introduce a high-speed 3-D shape measurement technique based on composite
phase-shifting fringes and a stereo camera system. Epipolar constraint is adopted to search
the corresponding point independently without additional images. Meanwhile, by analysing
the 3-D position and the main wrapped phase of the corresponding point, pairs with an
incorrect 3-D position or considerable phase difference are effectively rejected. Then all the
qualified corresponding points are corrected, and the unique one as well as the related period
order is selected through the embedded triangular wave. Finally, considering that some points
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can only be captured by a single camera in some shading areas, the final period order of these
points in one camera and the one of their corresponding points in another camera always
have different values, so left-right consistency check is employed to eliminate those
erroneous period orders in this case. Several experiments on both static and dynamic scenes
are performed, verifying that our method can achieve a speed of 120 frames per second (fps)
with 25-period fringe patterns for fast, dense, and accurate 3-D measurement.
Time: 13:40-13:55
Three-dimensional measurement based on a Greenough-type stereomicroscope using
phase-shifting projection
Mr.Yan Hu, Qian Chen, Yuzhen Zhang, Tianyang Tao, Hui Li and Chao Zuo
Nanjing University of Science and Technology, China
We propose an absolute 3D micro surface profile measurement technique based on a
Greenough-type stereomicroscope. The camera and the projector are fi xed on the
stereomicroscope, facilitating a flexible 3D measurement of objects with different heights.
Experiments of both calibration and measurements are conducted, and the results show that
our proposed method works well for measuring different types of geometry like spheres,
ramps and planes etc. The reconstruction accuracy can achieve 4.8 µm with a measurement
depth about 3 mm.
Time: 13:55-14:10
Computational method for multi-modal microscopy based on transport of intensity equation
Mr. Jiaji Li, Chao Zuo and Jialin Zhang
Nanjing University of Science and Technology, China
In this paper, we develop the requisite theory to describe a hybrid virtual-physical
multi-modal imaging system which yields quantitative phase, Zernike phase contrast,
differential interference contrast (DIC), and light field moment imaging simultaneously based
on transport of intensity equation(TIE). We then give the experimental demonstration of
these ideas by time-lapse imaging of live HeLa cell mitosis. Experimental results verify that
a tunable lens based TIE system, combined with the appropriate post-processing algorithm,
can achieve a variety of promising imaging modalities in parallel with the quantitative phase
images for the dynamic study of cellular processes.
Time: 14:10-14:25
The importance of the boundary condition in the transport of intensity equation based phase
measurement
Ms. Jialin Zhang, Qian Chen, Jiaji Li and Chao Zuo
Nanjing University of Science and Technology, China
The transport of intensity equation (TIE) is a powerful tool for direct quantitative phase
retrieval in microscopy imaging. However, there may be some problems when dealing with
the boundary condition of the TIE. The previous work introduces a hard-edged aperture to
the camera port of the traditional bright field microscope to generate the boundary signal for
the TIE solver. Under this Neumann boundary condition, we can obtain the quantitative
phase without any assumption or prior knowledge about the test object and the setup. In this
paper, we will demonstrate the effectiveness of this method based on some experiments in
practice. The micro lens array will be used for the comparison of two TIE solvers results
- 67 -
based on introducing the aperture or not and this accurate quantitative phase imaging
technique allows measuring cell dry mass which is used in biology to follow cell cycle, to
investigate cell metabolism, or to address effects of drugs.
Time: 14:25-14:40
Practical considerations for high-speed real-time 3-D measurements by the fringe projection
Mr. Shijie Feng, Qian Chen, Chao Zuo and Anand Asundi
Nanjing University of Science and Technology, China
Fringe projection is an extensively applied technique for optical three-dimensional (3-D)
shape measurements. Although showing favorable performance for motionless objects, it
tends to have difficulties to retrieve surfaces globally or locally varying over time. The
reason is that common methods developed for static scenes are prone to fail when measuring
dynamic processes. Therefore to facilitate the application of high-speed real-time
measurements, we suggest considerations from four aspects to improve conventional fringe
projection methods. The first two aspects are related to raising the measuring efficiency,
which can be achieved by encoding the measured object robustly yet with less required
patterns, and by increasing the rate of pattern projection which is a bottleneck restricting the
measuring speed. The third consideration is to obtain accurate 3-D reconstructions by
removing unreliable points induced by system and random errors during dynamic
measurements. The last one is to handle moving shiny objects as it is supposed to be a
time-consuming process for traditional approaches. We believe the mentioned considerations
will help ease the efforts to achieve desired results for fast real-time measurements.
Time: 14:40-14:55
Applications of Two Phase-height Mapping Algorithms for PMP in 3D Reconstruction of the
Railway Wheel Tread
Ms. QinChuyue, Wang Zeyong, Zhang Yu*,Huang Qian
Physics Academy of Southwest Jiaotong University, Chengdu, China
In this paper, the phase information of a railway wheel tread is obtained based on
Phase-measuring profilometry, meanwhile, the height information is reconstructed by two
phase-height mapping algorithms. The first is traditional phase-height mapping algorithm,
which need stranslatingds the reference plane several times. Due to the reconstruction of the
height information influenced by abrupt phase changes while moving the reference plane, the
phase information needs to be converted to be the real phase information. In order to obtain
accurate parameters, the reference plane needs to be translated several times, which is a
complex procedure. Besides, the calculation is also complicated because of different
coefficients in different pixels. The second method is the new phase-height mapping
algorithm, which needs building the relationship between phase and height based on seven
height-known circular cones. The new method could divide the calibration coefficients and
coordinates efficiently. Only the common coefficients that are not related to the sample
coordinates are required during calibration, which would decrease the amount of calibration
points. There is a comparison between the traditional method and the new method in this
paper, and it concludes that the traditional method could make the result more accurate but
the new method could be more convenient.
Time: 14:55-15:10
Flexible and accurate camera calibration using imperfect planar target
Ms. Suzhi Xiao, Wei Tao, Hui Zhao
- 68 -
Shanghai Jiao Tong University, China
Camera calibration using a 2D planar board is widely applied because of the flexibility and
simplicity of this method. However, this technique fails to yield reliable and accurate
calibration results when an imperfect planar target is used. The accuracy of the image and
world coordinates for the extracted corners, which are prerequisites for deriving precise
camera parameters, are affected by the lens distortion and the non-planarity of the calibration
target. In this paper, the accuracy of the obtained image coordinates is improved by
combining a Hilbert transform with a traditional calibration method. In addition, the
geometry of the calibration target is fully considered so as to acquire precise world
coordinates using an overall nonlinear parameter optimization algorithm. The reprojection
error of the proposed method is reduced by 80% compared with the traditional method for a
significantly deformed planar target, which demonstrates the superiority of the proposed
camera-calibration technique.
Time: 15:10-15:25
An out-of-plane displacement measurement system based on hardware tracking
Dr. Chen Xiong, Ming Zhang, Wenxin Hu, and Hong Miao
Key Laboratory of Mechanical Behavior and Design of Materials (CAS), Department of
Modern Mechanics, University of Science and Technology of China, Hefei, 230027, China
In this work, we propose an laser-interference based measurement method that employs a
hardware device in the reference arm to track the out-of-plane displacement in the objective
arm. Then a real-time one-point out-of-plane displacement measurement system is built up
using a Michelson interferometer, a PZT device, a CCD camera and a tracking control
system. The system works by checking the movement of fringes and then promoting PZT to
track the displacement. A tracking algorithm including direction judgment and correlation
computation is developed to decide whether PZT is started and the distance that PZT is
ordered to move. Experimental results demonstrate the effectiveness of the system and
finally the detailed mechanism of the system is discussed.
Time: 15:25-15:40
Body parameters measurement using a single Kinect
Mr. YijunJi, Anand Asundi, and Zhijiang Zhang
Shanghai University, China
This paper presents a system to reconstruct 360-degree 3D model of human body and
measure its parameters with a single consumer-grade range sensor (Kinect). Unlike other
systems, our system is more flexible in that the user can rotates by himself freely instead of
standing on a rotation stage. We propose a method based on the framework of Kinectfusion.
Kinectfusion often loses thesensor's track inthe caseoffast and notstrict-rigid moving of
human body. So we extend it by a novel piecewise tracking and mapping algorithm for
enhancing the robustness. We segment the Kinectfusion into several stages in time domain,
then bridge the different SLAM stages by proposed model-model ICP algorithm.In
addition,asimplebuteffectiveapproachisintroducedtocalculatemodel'svolumeand
perimeter.
Extensiveexperiments validatethat our system isableto reconstructaccurate 3Dmodel
ofhuman body in the natural indoor scenarios. The system also performs well in measuring
objects' volume and perimeter of certain section with average2.2%and6.2%errorrespectively
- 69 -
SPC Competition II < Others >
Venue: Homalayan A
Chair:
Time: 16:00-18:15pm
Note:
*Competition Opening Remarks
Chair:
*Evaluation: professional judges will score it and select the First, Second, Third, and Individual prize.
Trophies and certificates will be awarded at the dinner banquet.
*The certification of Oral presentations will be awarded at the end of each session.
*To show the respect to other authors, especially to encourage the student authors, we strongly
suggest you attend the whole session, the scheduled time for presentations might be changed due to
unexpected situations, please come as early as you could.
* Competition group photo will be taken at the end of the session and updated online.
Time: 16:10-16:25
Distortion analysis of index matched anisotropic crystal lens with the ray tracing model
Mr. Jong-Young Hong, Chang-Kun Lee, Byounghyo Lee and Byoungho Lee
Seoul National University, Korea, Republic of
In this paper, we propose the index matched anisotropic crystal lens. The proposed optical
element acts as a transparent glass in extraordinary polarized light and a lens in ordinary
polarized light. The conceptual diagram and principle of the index matched anisotropic
crystal lens are presented and the ray tracing simulation is performed to verify and analyze
the functionality and the distortion of the real world scene. The index matched anisotropic
crystal lens is implemented with calcite and the index matching liquid. The preliminary
system to show the feasibility of the proposed optical element is implemented. The lens
mode and the transparent mode are presented and the distortion along the incident direction
of the light is also analyzed by the experiment. It is expected that the index matched
anisotropic crystal lens can be a good candidate for the head-up display and head-mounted
display.
Time: 16:25-16:40
A method to generate hologram based on 3D central slice theorem
Ms. Dan Xiao, Di Wang, Qiong-Hua Wang
School of Electronic and Information Engineering, Sichuan University, China
Non-coherent light source condition records a three-dimensional hologram scene and has its
unique advantages, which combines mathematical technology with traditional optical
holography technology, and the device is the hologram recording medium, the
three-dimensional hologram of the scene can be recorded under normal lighting conditions.
Integrated holography is the main solution which can avoid the mechanical rotating camera
- 70 -
problems which brings the recording process complexity and cannot record movement of
three-dimensional objects, therefore the method based on spatial multiplexing to generate
three-dimensional computer-generated hologram is proposed. This paper proposes a method
to generate hologram using the principle of three-dimensional central slice theorem. We use
the array of orthographic projection images to obtain the Fourier spectrum of 3D object. By
calculating its Fresnel diffraction, the Fresnel hologram can be generated using holographic
coding. Numerical simulation verifies the feasibility of the proposed method.
Time: 16:40-16:55
Performance of Range Gated Reconstruction: A Theoretical Analysis
Ms. Sing Yee Chua, Xin Wang, Ningqun Guo, Ching Seong Tan
Monash University,Malaysia
Performance of a range gated system is strongly affected by the laser, sensor, target, and
atmospheric parameters. This paper performs a theoretical analysis to investigate the
influence of multiple factors on range gated reconstruction. The effects of several factors are
discussed based on the operating principle of range gated reconstruction, fundamental of
radiant energy, signal to noise ratio (SNR), and bidirectional reflection distribution function
(BRDF) models. The presented findings establish a comprehensive understanding of the
influence factors in range gated reconstruction which are of interest to various applications
and future improvement works to perform accurate range correction and compensation.
Time: 16:55-17:10
A positional misalignment correction method for Fourier ptychographic microscopy based on
simulated annealing
Mr.Jiasong Sun, Yuzhen Zhang, Qian Chen and Chao Zuo
Nanjing University of Science and Technology, China
Fourier ptychographic microscopy (FPM) is a newly developed super-resolution technique,
which employs angularly varying illuminations and a phase retrieval algorithm to surpass the
diffraction limit of a low numerical aperture (NA) objective lens. In current FPM imaging
platforms, accurate knowledge of LED matrix’s position is critical to achieve good recovery
quality. Furthermore, considering such a wide field-of-view (FOV) in FPM, different regions
in the FOV have different sensitivity of LED positional misalignment. In this work, we
introduce an iterative method to correct position errors based on the simulated annealing
(SA) algorithm. To improve the efficiency of this correcting process, large number of
iterations for several images with low illumination NAs are firstly implemented to estimate
the initial values of the global positional misalignment model through non-linear regression.
Simulation and experimental results are presented to evaluate the performance of the
proposed method and it is demonstrated that this method can both improve the quality of the
recovered object image and relax the LED elements’ position accuracy requirement while
aligning the FPM imaging platforms.
- 71 -
Time: 17:10-17:25
Analysis of the Scattering Performance of Human Retinal Tissue Layers
Ms. Dan Zhu, Zhishan Gao, Haishui Ye and Qun Yuan
Nanjing University of Science and Technology, China
Human retina is different from other ocular tissues, such as cornea, crystalline lens and
vitreous because of high scattering performance. As an anisotropic tissue, we cannot neglect
its impact on the polarization state of the scattered light. In this paper, Mie scattering and
radiative transfer theory are applied to analyze the polarization state of backscattered light
from four types of retinal tissues, including neural retina, retinal pigment epithelial (RPE),
choroid and sclera. The results show that the most backscattered zones in different depths
have almost the same electrical fields of Jones vector, which represents the polarization state
of light, whether neural retina layer is under normal incidence or oblique incidence. Very
little change occurs in the polarization of backscattered light compared to that of the incident
light. Polarization distribution of backward scattered light from neural retina layer doesn’t
make apparent effects on polarization phase shifting in spectral domain OCT because its
thickness is far less than photon mean free path, while other retinal tissues do not meet this
rule.
Time: 17:25-17:40
Measurement device for high-precision spectral transmittance of solar-blind filter
Mr. Yan Wang, Yunsheng Qian, Yang Lv, Cheng Feng and Jian Liu
Nanjing University of Science and Technology, China
In order to measure spectral transmittance of solar-blind filter ranging from ultraviolet to
visible light accurately, a high-precision filter transmittance measuring system based on the
ultraviolet photomultiplier is developed. The calibration method is mainly used to measure
transmittance in this system, which mainly consists of an ultraviolet photomultiplier as core
of the system and a lock-in amplifier combined with an optical modulator as the aided
measurement for the system. The ultraviolet photomultiplier can amplify the current signal
through the filter and have the characteristics of low dark current and high luminance gain.
The optical modulator and the lock-in amplifier can obtain the signal from the
photomultiplier and inhibit dark noise and spurious signal effectively. Through these two
parts, the low light passing through the filters can be detected and we can calculate the
transmittance by the optical power detected. Based on the proposed system, the limit
detection of the transmittance can reach 10-12, while the result of the conventional approach
is merely 10-6. Therefore, the system can make an effective assessment of solar blind
ultraviolet filters.
Time: 17:40-17:55
EUV multilayer defects reconstruction based on the transport of intensity equation and
partial least-square regression
Dr. Jiantai Dou, Zhishan Gao, Zhongming Yang, Qun Yuan and Jun Ma
Nanjing University of Science and Technology, China
- 72 -
Multilayer defects which reside on the top or inside the multilayer are one of the most critical
concerns in the extreme ultraviolet lithography (EUVL) manufacturing process. We proposed
the transport of intensity equation and partial least-square regression (TIE & PLSR) method
to inspect the defect and reconstruct its geometric parameters: height and full width at half
maximum (FWHM). The transport of intensity equation (TIE) is employed to retrieve the
phase of the multilayer defect from the two scattering images, which collected at two
adjacent propagation distances. Comparing the simulated ideal phase, the phase deformations
caused by different top heights and widths of the defects are analyzed. The optical properties
maximum, minimum and fitting Zernike coefficients are used to parameterize the phase
deformation. Partial least-squares regression (PLSR) is applied to associate the optical
properties of the phase deformation with the geometric parameters of the defects, and
reconstruct geometric parameters of the measured defect from the established data library.
The reconstruction error is less than 0.2% in simulation experiment.
Time: 17:55-18:10
The Infrared Image Closely Spaced Objects Super Resolution Method Based On Sparse
Reconstruction Under The Noise Environment
Mr. Zeng Jian, Yang Jungang, and Wu Hanyang
School of Electronic Science and Engineering, National University of Defense Technology,
Changsha, Hunan 410073, China
Super-resolution method based on sparse reconstruction is an effective way to deal with the
closely spaced objects problem, but when the targets in a noisy environment, the noise will
cover over the entire field, leading to the sparsity feature of the original scene is destroyed.
Aiming at this phenomenon, this paper proposed a super-resolution method which has the
adaptative reconstruction ability in noisy environments, this method takes full advantage of
the structural characteristics of the sensor and the reconstruction algorithm parameters,
through the establishment of infrared imaging model of the observed signals and pixel
meshing, establishment of the position and amplitude of the closely spaced objects of sparse
representation, and using the point spread function of the optical system to construct
over-complete dictionary, the last step is making the reconstruction parameters in a
reasonable range through controlling the ratio of non-zero elements in the rebuilt scene, so as
to achieve the purpose of removing noise interference and reconstruction of sparse targets
accurately. Simulation results show that the proposed method with adaptive reconfiguration
in noisy environments.
- 73 -
SPC Competition III< Laser Technology >
Venue: Homalayan B
Chair:
Time: 13:00pm-15:40pm
Note:
*Competition Opening Remarks
Chair:
*Evaluation: professional judges will score it and select the First, Second, Third, and Individual
prize. Trophies and certificates will be awarded at the dinner banquet.
*The certification of Oral presentations will be awarded at the end of each session.
*To show the respect to other authors, especially to encourage the student authors, we strongly
suggest you attend the whole session, the scheduled time for presentations might be changed due to
unexpected situations, please come as early as you could.
* Competition group photo will be taken at the end of the session and updated online.
Time: 13:10-13:25
Thermal degradation analysis of Sr2Si5N8:Eu2+ phosphor during high temperature aging
Dr. Qiuyue Wang, Yan Dong, Qiyue Shao, Xiaoming Teng, Jianqing Jiang
School of Materials Science and Engineering, Southeast University, China
Sr2-xEuxSi5N8 (x=0, 0.1, 0.24) were synthesized by high temperature solid-state
reaction. The thermal degradation in air was observed during heating and cooling
treatment. The crystal structural had no variation after 500℃ heating treatment. To
analysis the origin of thermal degradation, the diffuse reflectance spectra of
Sr1.76Eu0.24Si5N8 and Sr2Si5N8 host before and after heating treatment in air was
determined, the internal quantum efficiency and optical absorption rate of
Sr1.76Eu0.24Si5N8 was examined, the element binding energy and element content of
Sr2Si5N8 phosphor before and after baking was investigated. And at last, the surface
layers of baked and unbaked samples were observed by transmission electron microscope
(TEM) and high resolution transmission electron microscopy (HRTEM). According to all
these results, it is concluded that the main reason for thermal degradation is the formation
of an oxidized amorphous layer on the surface of Sr2Si5N8 host lattice, which decreased
luminescence efficiency after heat treatment.
Time: 13:25-13:40
Preparation of YAG:Ce Phosphor with Small Size by a Sol-gel-molten Salt Method
Dr. Li Song, Yan Dong, Qiyue Shao, Jianqing Jiang
College of Materials Science and Engineering, Southeast University, Nanjing, China
As an excellent host material, yttrium aluminum garnet (Y3Al5O12, YAG) has been
extensively studied due to its promising optical properties and good chemical and thermal
stability. Ce3+-doped YAG, abbreviated as YAG: Ce3+, can effectively convert blue light
to yellowish-green light, and has been used for white solid-state lighting when combined
- 74 -
with a blue light-emitting diode (LED). Generally, commercial YAG: Ce3+ phosphor is
prepared by high temperature solid state method, and the high crystallinity of the
as-synthesized YAG: Ce3+ phosphor is beneficial for its further application. However, this
method also results in a large particle size and uneven size distribution, seriously affecting
the uniformity and efficiency of white LED light. One strategy to reduce the particle size
is the use of grinding process. However, their luminescent properties would significantly
decrease because of the deterioration of the surface crystallinity. And conventional wet
chemistry methods (like sel-gol method, coprecipitation method, atc.) were difficult to
preparate YAG: Ce3+ phosphor with well dispersive and highly luminescent efficiency.
Therefore, it is still a great challenge to synthesize high efficiency and small-sized YAG:
Ce3+ phosphor. In this work, YAG: Ce3+ precursor particles were obtained via sel-gol
method, and the precursor particles were calcined with the molten salt. The effects of
molten salt composition, calcine temperature on the luminescent properties and size of the
YAG: Ce3+ phosphors were systematically investigated. It was found that the luminescent
efficiency of YAG: Ce3+ calcined in the NaCl at 1000℃ for 2h can be 88% of the
commercial YAG: Ce3+ phosphor , and the particle size is about 1-2μm. This method
provides a convenient way to prepare high efficiency and small-sized YAG: Ce3+
phosphor, and may be suggestive for the synthesis of other types of phosphor.
Time: 13:40-13:55
Reflection type metasurfaces for complex-amplitude modulation at visible frequency
Mr. Gun-Yeal Lee, Joonsoo Kim, Yohan Lee, and Byoungho Lee
Seoul National University，Korea
In this paper, we propose a novel strategy for designing a reflection-type metasurface that
is capable of simultaneously manipulating both phase and amplitude of visible light. The
proposed metasurface consists of the Xshaped poly crystalline silicon (poly-Si) nano
structures which efficiently modulate the visible light and a gold substrate was used with a
dielectric spacer to reflect the light. Our finite element method (FEM) simulation results
show that our metasurface can perfectly cover the full-range of both amplitude and phase.
The proposed structure operates on green light with wavelength of 532 nm and has
subwavelength-sized pixels whose lengths are 350 nm. Moreover, the total efficiency,
which is defined as a ratio of the reflected signal power to the input power, reaches 40%.
Our scheme enables the perfect reconstruction of both amplitude and phase of light with
high efficiency and high resolution at the visible range of light. In addition, the proposed
structure eliminates the DC component which interrupts the reconstruction of hologram.
Because of these advantages, our strategy would be applicable to numerous practical
holographic applications
Time: 13:55-14:10
Experimental study on defocus image in optical scanning holography
Mr. Jianming Yue, Dingfu Zhou, Sheng Yuan, Peng Zhang, Aqian Sun, and Xin Zhou
Department of Opto-Electronics Science and Technology, Sichuan University, Chengdu
610065, China
A pinhole is usually used as the pupil in traditional optical scanning holography (OSH)
method. Although such a structure is relatively simple, the in-focus sectional image may
be degraded by out-of-focus haze because of its difficulty to be eliminated in sectional
- 75 -
image reconstruction. In this paper, a random-phase pupil is employed in OSH system to
reduce the impact of defocus image. It is proved by the experimental results that the
defocus image trends to be more easily dispersed into speckle-like pattern, and then it can
be removed by connected component method in the future. Analysis also focuses on the
correlation coefficient between the original image and the reconstructed images under the
conditions of adopting a pinhole or a random-phase pupil. From comparison, as the
defocus distance increasing, one can find that the correlation coefficient of image by using
a random-phase pupil is decreasing faster than using a pinhole pupil.
Time: 14:10-14:25
A heuristic model of aperture-averaged angle-of-arrival variance for a Gaussian wave through
anisotropic non-Kolmogorov turbulence
Dr. Chao GAO, Yiming LI, Maoke MIAO, Haodong LIANG, and Xiaofeng LI
University of Electronic Science and Technology of China
This paper investigates the aperture-averaged angle-of-arrival variance for a Gaussian wave
propagating through the weak anisotropic non-Kolmogorov atmospheric turbulence along a
horizontal path. A heuristic model is deduced from the results of plane and spherical waves
under the geometrical optics approximation. The mathematical expression includes the spectral
power law value, the anisotropic factor and other essential optical parameters of a Gaussian
wave.
Time: 14:25-14:40
The effect of linearity of tunable laser to the quality of synthetic aperture laser radar’s image
Mr. Yaxu Wang, Yan Zhang, Rongzhu Zhang and Mei Chen
Sichuan University, China
In the application of aperture laser radar, in order to improve the range resolution of image, in
general adopting linear modulation signal. But in practice, the transmitting signal of tunable
laser is linear wavelength modulation. In order to make clear the effect of linearity of tunable
laser to the quality of synthetic aperture laser radar’s image, the expression of linearity of linear
wavelength modulation signal has been developed according to the definition of linearity and
the effect of linear wavelength modulation signal to the quality of synthetic aperture laser
radar’s image has been analyzed. The result shows that the same influence trend that with the
pulse during time and coefficient of wavelength-modulated increase, the linearity increase and
the quality of synthetic aperture laser radar’s image deteriorate and that the increasing carrier
wavelength do the reverse. And further a step, the linearity and the quality of synthetic aperture
laser radar’s image have been positive correlative, so the linearity deteriorates the range
resolution of laser radar.
Time: 14:40-14:55
Analysis of Laser Induced Thermal Damage Influenced by Micro Defect
Dr. Xiao-Bing Zhu, Long-Xia Zhang, and Rong-Zhu Zhang
Sichuan University, China
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Thermal damage for material with the presence of a cone defect is studied. Firstly, a
three-dimensional thermal damage model is established. Then, the distribution of electric field
intensity and temperature of defective Si irradiated by laser pulse is calculated by the method of
FDTD. At the same time, melting threshold of the Si material with defect is calculated and its
variation rule with the height of the defect is analyzed. The results show that, the redistributed
electric field is different in different depth of material. The maximum electric field intensity in
the plane of each xOy is periodically changed over the height of material. The maximum
electric field intensity in the first period near the surface is the crest value throughout the
material. The value of melting threshold of material is the lowest when height of defect is 240
nm.
Time: 14:55-15:10
Moving characteristics of hot spots on target plane in novel beam smoothing schemes
Mr. Pengcheng Hou, Tengfei Li, Jian Wang, Bin Zhang
Sichuan University, China
The radial smoothing scheme based on optical Kerr effect was proposed to quickly improve the
irradiance uniformity of the laser beam. In order to analyze the moving characteristics of speckles on
target plane, the transverse moving model has been established based on the concept of equivalent focal
length. The analytical expression for the radial moving speed of the speckles in radial smoothing (RS) has
been derived, and the moving characteristics have further been analyzed. Results indicate that, the focal
spot tends to be larger when the radial moving speed increases. With a temporal shape of triangular wave,
the pump laser generates a constant radial moving speed and achieves better smoothing effect. Due to the
difficulty in obtaining the triangular pump laser in picoseconds level, the temporal shape of
Gaussian wave was further optimized to obtain the greater speed while maintaining the same beam
smoothing performance in the RS scheme. To further improve the smoothing performance of the radial
smoothing scheme, the hybrid dispersion grating scheme is introduced to achieve the multidirectional
smoothing. By introducing the hybrid dispersion grating to the radial smoothing scheme, the final beam
smoothing performance is much better than either of them.
Time: 15:10-15:25
Performance Analysis of Long-wave Infraed Wireless Optical Communication Based on DPIM
Mr. Kang Gu, Zhiyong Xu, and Jinyuan Wang
PLA University of Science and Technology, China
Long-wave infraed wireless communication has much advantage over short-wave infraed. In this paper,
the bit error rate performance of LWIR by DPIM is analyzed. The intensity fluctuations of the optical
signal are modeled by log-normal distribution, the intensity attenuations are modeled by emprical
formula of fog. The system noise includes generation-recombination noise and thermal noise
typically for Photoconductive HgCdTe detector. The numerical results of BER are presented.
The results illustrate the BER depends on the turbulence strength, bit rate, optical power and
link length.
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Time: 15:25-15:40
Study on Thermally Control Terahertz Narrow Bandpass Filter
Fang Ling, Mr. Renshuai Huang, Qinglong Meng, Weili Li and Bin Zhang
College of Electronics and Information Engineering, Sichuan University, China
In general, the terahertz metamaterial filter based on the complementary structure mainly has
the fixed resonant frequency and asymmetric resonant frequency edges. In this paper, a
thermally control terahertz narrow bandpass filter consisting of a periodic array of
complementary wires embedded with thermosensitive semiconductor indium antimonide (InSb)
has been proposed. Due to the structure of the filter is relatively simple, it can be more easily
fabricated by lithograph technology compared with traditional terahertz metamaterial filter
structure. Furthermore, its performance has also been analyzed based on the effective medium
theory and the Drude model. The results show that the resonant frequency shifts from 1.16THz
to 2.11THz with the increasing of the temperature from 160K to 360K, and the blueshift of
resonance frequency as large as 81% can be implemented. Meanwhile, the reflectivity at the
resonant frequency almost tends to be zero and the transmissivity spectrum at the resonant
frequency exhibits sharp and symmetric edges. The filter can be applied to THz imaging
system, and can effectively improve the imaging quality as a result of well characteristics of
dynamic tuned filer and relatively simple structure.
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Session 3 < Image Processing >
Venue: Homalayan B
Chair:
Time: 16:00-18:15pm
Note:
* The certification of Oral, listeners, will be awarded at the end of each session.
* For the Best Presentation of each session, it is encouraged to award it to student author prior.
*To show the respect to other authors, especially to encourage the student authors, we strongly
suggest you attend the whole session, the scheduled time for presentations might be changed due to
unexpected situations, please come as early as you could.
* session photo will be taken at the end of the session and update online
Time: 16:00-16:20
High accuracy digital image correlation accelerated by parallel computing technology
Assoc. Prof. Zhenyu Jiang
School of Civil Engineering and Transportation, South China University of Technology,
Guangzhou 510640, China
Digital image correlation (DIC) has demonstrated its importance and flexibility in high
precision, non-contact and full field optical measurements nowadays. In the methodology
study of DIC, two key issues have been investigated persistently in the past decades, i.e.
measurement accuracy and computation efficiency. To achieve high accuracy, various
sub-pixel registration algorithms have been developed, among which the iterative DIC
algorithms, represented by the forward-additive Newton-Raphson (FA-NR) algorithm and the
inverse compositional Gauss-Newton (IC-GN) algorithm, have been proven to be superior
choices and become the virtual standard DIC algorithms in academic and industrial
communities. However, the iterative DIC algorithms are computationally expensive due to
their nature of non-linear optimization, which makes the computation efficiency a major
challenge. Very recently, parallel computing technology has been introduced to accelerate the
iterative DIC algorithms. The parallel computing can be implemented based on multi-core
CPU or GPU devices, and leads to significant speed up. In this presentation, the DIC powered
by the two parallel computing techniques will be elucidated and compared. GPU-based
implementation demonstrates the superiority over the multi-core CPU-based implementation
by combining coarse-grain and fine-grain parallelization, and meets the speed requirement for
real-time high accuracy DIC.
Time: 16:20-16:35
Fusion method of visible and infrared images based on calibration information and regional
energy optimization
Dr. CHENG Xiang-zheng, SHAO Ming, ZHANG Hong-bo, ZHAO Wei, ZHANG Lei, BAI
Bing
Luoyang Electronic Equipment Test Center of China , Henan Luoyang 471003, China
By fusing the visible and infrared images to improve the detection and recognition ability of
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equipments is a focus research. Aiming at the contradictory aspects of the current fusion
algorithm for speed and accuracy，a fusion algorithm of visible and infrared images is
proposed. Firstly, the visible and infrared imaging systems’ calibration information is obtained
by calibrating the system. Secondly, the correspondence between visible image and infrared
image pixel is established through constructing mathematical model. Finally, on the basis of
Laplace decomposition, the visible and infrared images is fused with regional energy
optimization principle. The experimental result shows that the proposed method increases the
speed by 22.9%, improving the real-time performance of the fusion algorithms, while remains
registration accuracy unchanged.
Time: 16:35-16:50
Single-Pixel Imaging and Its Applications
Dr. Wen Chen
The Hong Kong Polytechnic University, China
Single-pixel imaging, such as ghost imaging, has attracted much attention in recent years, and
various theories and applications have been widely studied or explored, such as remote
sensing, imaging in turbid media and optical security. Here, new results about single-pixel
imaging are presented, and the applications to optical security are mainly discussed. For
optical encoding, new studies, such as modulating phase via rotation, iterative and
non-iterative phase extraction schemes and pixel modulation, are presented, and system
security and robustness will be discussed. For optical authentication, new studies, such as
sparse phase, binary signals and marked signals, are presented, and system security and various
characteristics will also be discussed. It is expected that these new studies in my research
group might shed some light on the future research about single-pixel imaging and its
applications.
Time: 16:50-17:05
Parallel Analysis of Single Closed Fringe Pattern using Graphic Processing Unit
Dr. Haixia Wang and Shuailong Mao
Zhejiang University of Technology, China
Fringe patterns are common outcomes of various optical interferometric techniques, such as
electronic speckle pattern interferometer, fringe projection profilometry, and synthetic aperture
radar. Fringe pattern analysis especially single close fringe pattern analysis, including fringe
pattern denoising, phase extraction and phase unwrapping, are often time consuming. In this
paper, we propose a fast parallel analysis framework for single closed fringe pattern using
graphics processing units (GPU). Coherence enhancing diffusion, spiral quadrature transform
with quality guided orientation unwrapping, and quality guided phase unwrapping are adapted
in the framework and implemented using GPU. One frame per second is achieved in
processing 1024×1024 fringe patterns using NVIDIA Quadro K4200. Up to 250× speedup is
obtained using the proposed framework than sequential C in Intel(R)Xeon(R) CPU
E5-2630v3@2.4GHz.
Time: 17:05-17:20
Optical encryption of gray image based on the computer generated hologram and logical
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modulation
Hui Ren, Assoc. Prof. Jun Wang*, Qiong-hua Wang
College of Electronic and Information Engineering, Sichuan University, China
In this paper, we proposed a novel optical encryption and decryption method of gray image
based on the computer-generated hologram (CGH), the chaos theory and the logical
modulation. In the encryption process, the hologram, which is gotten by Fresnel diffraction
from the gray image, is modulated with the chaotic sequence, and the output is encryption
image. The decryption is an inverse process of encryption. Experiment results verified the
security and robustness of the proposed approach. Moreover, the proposed encryption method
could be applied in where requires more security and more flexibility as the field of national
defense science and technology.
Time: 17:20-17:35
Parallel computing for fast and accurate phase analysis of fringe pattern by two-dimensional
phase-shifting methods
Dr. Shien Ri, Qinghua Wang, Hiroshi Tsuda
National Institute of Advanced Industrial Science and Technology, Japan
Phase analysis techniques of fringe patterns have been widely used for noncontact
three-dimensional shape and deformation measurement by the fringe projection method.
Recently, we developed two novel accurate phase analysis methods. One is the
two-dimensional sampling moiré method to perform robust phase analysis for a single-shot
fringe pattern. The other is the two-dimensional spatiotemporal phase-shifting method to
analyze phase distribution accurately for multi-step phase-shifted fringe patterns. To perform
accurate phase analysis under low signal-to-noise ratio conditions, both the above two methods
use the two-dimensional discrete Fourier transform or fast Fourier transform. Therefore, these
algorithms are computationally expensive compared with the conventional one-dimensional
sampling moiréand phase-shifting methods. In this study, a fast parallelization implementation
for two-dimensional phase-shifting methods, including the two-dimensional sampling moiré
method and the spatiotemporal phase-shifting method, are presented by utilizing multi-core
CPU. Simulation and experimental results demonstrate that phase analysis can reach 7.5 and
5.9 times faster by use of a 12-core CPU compared with a single CPU.
Time: 17:35-17:50
Design of UAV high-resolution image transmission system
Mr. Gao Qiang, JiMing Panglan, Jiang Wentao, Fan Pengcheng, Zhang Xincheng
Xi' an Institute of applied optics, Xi' an 710065,Shaanxi,China
In order to solve the problem of the bandwidth limitation of the image transmission system on
UAV, a scheme with image compression technology for mini UAV is proposed, based on the
requirements of High-definition image transmission system of UAV. The video codec standard
H.264 coding module and key technology was analyzed and studied for UAV area video
communication. Based on the research of high-resolution image encoding and decoding
technique and wireless transmit method, The high-resolution image transmission system was
designed on architecture of Android and video codec chip; the constructed system was
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confirmed by experimentation in laboratory, the bit-rate could be controlled easily, QoS is
stable, the low latency could meets most applied requirement not only for military use but also
for industrial applications.
Time: 17:50-18:05
On Bit-depth of Pattern in Three-dimensional Measurement System Based on Digital Fringe
Projection
Prof. Li Yong, Chen Jinbiao, Tu Yanshuai, Wang Hui
Zhejiang Normal University, China
Fringe pattern can be projected fast by digital projector using DLP technology. The projection
speed is higher when patterns with lower bit-depth are adopted. The phase error of sinusoidal
fringe pattern with different bit-depth is studied with three-step phase-shifting algorithm. The
uniform quantization algorithm (UQA) and quantization algorithm with error diffusion (EDA)
are used for pattern quantization. The conclusions are as following. 1) With UQA, the
maximum of phase error will less than 1% of 2π when bit-depth is higher than 4 bits. If the
projector is defocused, the error will be decreased. 2) With EDA, the maximum of phase error
is larger than that with UQA. But the error will be decreased significantly when the projector is
defocused. The phase error of pattern with EDA is smaller than that of pattern with UQA when
the projector is nearly focused and the period of pattern is long (for example longer than 20
pixels). If the period of pattern is short, the performance of UQA is always better. 3) The error
difference of UQA and EDA will be very small when the bit-depth is higher than 4 bits.
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Listeners
Note:
* The certification of listeners will be awarded at the end of session.
* For the Best Presentation of each session, it is encouraged to award it to student author prior.
*To show the respect to other authors, especially to encourage the student authors, we strongly suggest you
attend the whole session, the scheduled time for presentations might be changed due to unexpected situations,
please come as early as you could.
Dr. ZongHui Chen
Beihang University, China
Dr. Xianyu Zhang
The Large Binocular Telescope
Observatory, USA
Dr. Kemao Qian
Nanyang
Technological
University，Singapore
Assoc. Prof. Pin Wang
Chogqing University, China
Mr. Dai Xianglu
Tsinghua University, China
Mr. Zhang Yi
Northwest Institute of Nuclear
Technology,
Xi’an,
shanxi
710024, China
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MEMO
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