IPH0.5/05.1
M.Sc. DEGREE (5 YEAR INTEGRATED COURSE) V SEMESTER EXAMINATION IN
PHOTONICS, DECEMBER 2005
CEL 1501 OPTICS-APPLIED OPTICS
Maximum marks : 50
SECTION A
(Answer any five questions)
(All questions carry equal marks)
(5x2 = I 0)
I. 1. Explain how colour-matching functions are related to chromaticity co-ordinates.
What do you mean by UCS-chromaticity diagram?
Explain the concept of Mueller matrices. Obtain the Mueller matrix for neutral
density filter.
Mention main material systems used for the generation of visible spectrum high
brightness LEDs giving special reference to their optical emission spectra.
Discuss the importance of electrode-less discharge lamps in lighting technology.
What is the difference between Pockel's.and Kerr electro optic effects? Mention two
practical applications of these effects.
Explain how birefringence leads to photo-elasticity.
Discuss the coherence requirements in the construction ota.hologram.
8. Distinguish between retarder plate and polarizer: Explain the use of any one of the
standard retarder plates.
SECTION B
(Answer all questions)
(All questions carry equal marks)
(5x8 =40)
II. Give an account of the working, construction details, power and efficiency factors of
different fluorescent lamps. Also mention its main advantages and disadvantages.
OR
III. a. In human colour vision model, considering different levels/stages, explain how the
final perception of colour, hue, brightness etc. can be achieved.
b. Write notes on any one of the following.
Light extraction efficiency and importance of escape cones in LEDs
Injection luminescence in SH and DH LEDs.
IV. a. Derive Stokes polarization parameters which describe different polarization states of
light and give their geometrical interpretations.
b. What is a Poincare sphere? Discuss how this representation can be used to describe
the different states of polarized light.
OR
(Turn over)
tho limo% limit 1% calculus and get the Jones vector tbr different polarization
00104
It
I OltIfilll the
matrix hn m liar a polarizer, a retarder and a rotator in Jones matrix
rahnluy
!cilium the different types of electro-optic effects. Explain how electro-optic effects
time in K DP crystal. Get the expression for half-wave voltage.
h calculate the half wave voltage for ADP crystal at wavelength X = 550nm The linear
electro optic coefficient 763 =8. 5pm/v and no = 1.52
OR
VII a. What do you mean by an acoustic wave? Give the theory of acousto-optic effect
based on birefringence.
b. Distinguish between Raman-Nath and Bragg diffraction in acousto- optic effects.
I n
VIII. a. Explain the concept of spread functions in optical imaging. Derive an expression for
point-spread function of an optical system.
b. Write down the significance of OTF in evaluating the image quality of optical
systems.
OR
IX a. Explain one method to measure the MTF of a perfect lens.
b. Write notes on any one of the following.
1.Phase retarders and polarization beam splitters based on birefringence.
2. Applications of active remote sensing systems.
X .a. Explain with necessary theory the recording and reconstruction of off-axis
holograms.
b. Briefly describe applications of holography.
OR
XI. Explain how speckles are formed. Describe how speckle pattern can be used to
measure out-of plane displacements.