Optical Diagnostics Research and Applications at MetroLaser
Presented at The University of California Irvine, March 24, 2006
by
James D. Trolinger, Ph. D
Vice-president and Co-founder
(949) 553-0688 http://www.metrolaserinc.com
History and Achievements
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June 1988: Founded by Drs. Cecil Hess and Jim Trolinger.
1994: U. S. SBA Distinguished Award of Excellence.
1995: U. S. SBA National Prime Contractor of the Year.
2000: Spun off 4DVision Technologies Inc.
2004: AIAA Aerodynamics Measurement Technology Award
2006: Ongoing collaborations with 14 universities
2006: 30 employees, 15 Ph. D’s.
• Thirteen electro-optical laboratories in Irvine CA.
• Providing State of the Art Optical diagnostic instruments,
services, & research to government and industry.
MetroLaser/UCI Collaborations
• MetroLaser has had joint contracts with
UCI continuously for nearly 18 years.
• Over 30 different programs, subcontracts in
excess of $2M.
• MetroLaser 4 fulltime employees and 10
interns from UCI.
• Currently have 3 active joint proposals
Summary
1. Laser Doppler Vibrometry
2. Aerodynamic and Aero optic Measurement
Technology
3. Optical Sensors for NDT, monitoring, detection,
and discrimination
4. Tracking and Ranging for Space Situation
Awareness
Technologies for Vibration
Analysis
• Electronic Digital Holography (PhaseCam)
• Laser Doppler Vibrometry
– Single beam
– Multiple beam
– Matrix
• Applications
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Non Destructive Testing
Modal analysis
Machinery health monitoring
Remote microphone
Land mine detection
MetroLaser Vibrometer
Impact Testing of a Concrete Column in the
Civil Engr. Lab at UC Irvine
Typical Frequency
Response of a Column
Increasing damage
Reduction of Natural Frequency
With Increasing Damage
Automotive Experiments
Use VibroMet 500 to measure the engine
vibration as a function of engine speed
Automotive Experiments
Variation of Peak Frequency and Velocity with Engine Speed
Landmine Detection
Scanning or Multipoint
Laser vibrometer
Loudspeaker
50-300 Hz
Ground
Surface
Land mine
MetroLaser LDV Cart Array
Lane 13, VS2.2., Depth = 1”
Broadband Excitation, 80-300 Hz
Multibeam LDV
Correlation of LDV Defect Data With
Ultrasound Image of a F-15 Vertical Stabilizer
MultiBeam Full Field Application
Dual Array Configuration
Custom Matrix Configuration
10” Blade - 4940 Hz
Electronic (Digital) Holography
• Holographic data stored on CCD array.
• Digital wavefront reconstruction
Phase shifting interferometry (hologram plane).
Diffraction theory (propagate to image).
• Interferograms are computed.
• Amenable to fiber optical implementation.
Commercial MetroLaser
wavefront sensor
Laser
Object Beam
Transmitting Lens
Receiving Lens
3D Plot of Turbine Blade Vibration Mode
Discovering Lincoln in the Cent
Profilometry
Detail of US penny shows
1 mm profiling resolution
Flow Visualization Holography
Analyzing flow fields for
density, velocity,
temperature
Dynamic optical Pathlength Measurements in real time
Complete experiment
Wavefront Data-Baseline L/D=9
Schematic of aero-optic model.
Aero-Optic Effects
Boundary layer
turbulence &
shock wave
Window
Cooling
Computer Model of System
Model
Model masks used
to simulate
aero-optic effects
Stress induced
widow aberrations
Imaging system
model
Aberrated
Wavefront
Shock
Turbulence
Window
Image
Plane
AOTS Simulated Aero-Optical Effects
Planar Doppler Velocimetry
System for use in the AEDC 16 Foot
Transonic Wind Tunnel Facility
Laser Reference Frequency
System
Proposed PDV installation in 16T
AF03-251 (AC10)
Fiber Optic Microsensors for HighResponse Gas Total Temperature
Measurement
Air Force Requirements
High response measurement of total temperature
distortion at up to 48 locations around turbine inlet.
Minimum flow blockage from sensor array
Robust against flow borne particulates
Probe replacement with minimum down-time
8000 R/s
T= 300 R
Task 2: Design of fiber optic microsensor
Construction
fiber cladding /  125mm
fiber core /  10mm
metallic mirror 0.01mm
FP etalon 1-2mm ZnSe / Si/SiC
0
metallic mirror 0.1mm
Characteristics
Intrinsic solid state FP sensor
Environmentally isolated
125mm
high bandwidth response
minimum flow disruption
2mm
high density array deployment
scattered
light
metal surface
detectors
scanner
scanner
feature
specular
reflection
Light Scattering Fatigue
Detection
Notched Fatigue Sample 13
P = 720 N
N = 9796
N = 14096
Nf = 43736
Active Laser Tracking System Concept
CPU: System control
& Data processing
 3D state vector
 Velocity
 Maneuvering
 Vibration
Visible & IR
Radiation
Seed
Laser
Laser driver
and controller
Coherent
Coherent
Detection
Radiation
Non-coherent
Radiation
Control and Data
Processing Platform
Beam directing & Propagation
through
telescope platform
atmosphere
Target tracking,
sensing & imaging
Laser Tracking System
(Operational Principles)
CPU
0.7O
M2
Multifunctional detector-array
provides information on:
• Delay time  distance
• Doppler shift  velocity V
• Spatial/angular coordinates
NLM
P2
IR
P1
Laser &
Visible
M1
FPI design and assembly
Desired Imaging FPI specification
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Tuning range:
t > 5 nm
Bandpass width:
p < 0.01 nm or p/ < 10-5
Acceptance angle:
p ~ 1 ~ 0.017 rad
Working aperture:
 1.0 inch
Transmittance
T0  40 – 50 %
Background rejection
> 20 dB
 Central-wavelength:
 ~700 nm
TDLAS System Layout for H2O
z
y
x
Fiber
flame
Beam launch
~3 cm
2-into-1 Fiber
combiner
w1 = 1343 nm
Tunable Diode
lasers
InGaAs
Detector
w2 = 1392 nm
Laser current
controller
Waveform
generator
Computer for
signal processing
Swirl Burner at UCI Combustion Lab
Results Comparison (T1)
TDLAS temperature and CO2 chemiluminescence:
1350.0
1330.0
1310.0
1290.0
1270.0
1250.0
1230.0
1210.0
1190.0
1170.0
1150.0
6500.0
6000.0
5500.0
5000.0
CO2* run avg
T1 run avg (K)
FS = -70% 100% Load
T1run
CO2 run
4500.0
0.0
10.0
20.0
30.0
40.0
50.0
4000.0
60.0
EA (%)
EA = excess air: air beyond stoichiometric
EPA SBIR Opportunities-coming
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Improving the Great Lakes
Control of Air Pollution
Monitoring and Remote Sensing
Green Buildings
Mining and Mine Waste Management
Lead Paint Detection and Removal
Agriculture and Rural Community Improvement
Management of Animal Feeding Operations
Drinking Water Treatment and Monitoring
Pollution Indicators for Beaches and Recreational Waters
Water and Wastewater Management
Innovation in Manufacturing for Environmental Protection
Nanotechnology
Engine and Vehicle
Emissions Reduction
Solid and Hazardous Waste
Homeland Security.
Website- www.epa.gov/ncer/sbir/
Homeland Security SBIR
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Opened10 March – 10 April, 2006 Full Proposals 10 April, 2006 Deadline for
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AEROSOL COLLECTION INTO LOW ANALYSIS VOLUMES (ACLAV)
RELIABLE PEROXIDE-BASED EXPLOSIVES DETECTION WITH LOW FALSE
ALARM RATE
ENHANCED EXPLOSIVE SAMPLE COLLECTION AND/OR
PRECONCENTRATION SYSTEMS
SIGNAL PROCESSING FOR A SOUTHERN BORDER SURVEILLANCE
SYSTEM
HUMAN DETECTOR FOR CARGO SHIPPING CONTAINERS
INSTANTANEOUS REMOTE SENSING DATA RECEIVING AND PROCESSING
FOR EMERGENCY RESPONSE
NETWORK-BASED BOUNDARY CONTROLLERS
BOTNET DETECTION AND MITIGATION
MANAGING MULTI-MEDIA SURVEILLANCE INFORMATION NETWORKS
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Thank you for your attention
You can download this presentation
from our website:
www.metrolaserinc.com