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Optical Engineering

Operating characteristics of pixelated gray-scale optically addressed spatial light modulators incorporating the twisted smectic-C* liquid crystal effect
Author(s): Louis W. K. Yim; Anthony B. Davey; Adrian R. L. Travis
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Paper Abstract

An optically addressed spatial light modulator using the twisted smectic-C* liquid crystal effect in the light-modulating layer and an intrinsic hydrogenated amorphous silicon in the photosensitive layer is fabricated. The device incorporates a layer of pixelated aluminum mirrors, sandwiched between photosensitive and modulating layers, to increase the reflectivity of the modulated output read beam. The device is capable of achieving an intrinsic gray-scale optical output. A spatial resolution of 27 lp/mm (i.e., 54 lines/mm) at 50% modulation depth driving at 2.0 kHz and a maximum frame rate of 2.5 kHz at 80% modulation depth for which a frame cycle includes erase, write, and read operations have been demonstrated. Other operating characteristics, i.e., the sensitivity and contrast ratio, are reported.

Paper Details

Date Published: 1 August 1998
PDF: 8 pages
Opt. Eng. 37(8) doi: 10.1117/1.601733
Published in: Optical Engineering Volume 37, Issue 8
Show Author Affiliations
Louis W. K. Yim, Univ. of Cambridge (United Kingdom)
Anthony B. Davey, Univ. of Cambridge (United Kingdom)
Adrian R. L. Travis, Univ. of Cambridge (United Kingdom)


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