Programmable deflector and scanner using a liquid crystal television (LCTV)

Narasimha S. Prasad; Sean M. Doyle; Michael K. Giles

doi:10.1117/12.216400

11 August 1995 Programmable deflector and scanner using a liquid crystal television (LCTV)

Narasimha S. Prasad, Sean M. Doyle, Michael K. Giles

Proceedings Volume 2537, Novel Optical Systems Design and Optimization; (1995) https://doi.org/10.1117/12.216400
Event: SPIE's 1995 International Symposium on Optical Science, Engineering, and Instrumentation, 1995, San Diego, CA, United States

Abstract

In this paper, deflection and scanning of a HeNe beam by a programmable phase Fresnel lens written on a LCTV has been demonstrated. Translation and tilt aberration respectively produces coarse and fine deflection of the beam. The rapid translation of the lens function, time dependent variation of the magnitude of the tilt aberration, and a combination of these two methods are used to demonstrate laser beam scanning. In our experiments, using the wavefront tilt aberration a measurable scan deflection accuracy of less than 8 (mu) rad is achieved. Using the lens translation scheme the beam is scanned over a 0.8 cm X 0.8 cm area at a distance of 50 cm. The scan time of the current system is limited by the standard video frame rate of the existing LCTV drive electronics. The performance limits of the LCTV-based deflection and scanning system are compared with those of acousto-optic deflectors and scanners.

Citation Download Citation

Narasimha S. Prasad, Sean M. Doyle, and Michael K. Giles "Programmable deflector and scanner using a liquid crystal television (LCTV)", Proc. SPIE 2537, Novel Optical Systems Design and Optimization, (11 August 1995); https://doi.org/10.1117/12.216400

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