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.