1 August 1998 Operating characteristics of pixelated gray-scale optically addressed spatial light modulators incorporating the twisted smectic-C* liquid crystal effect
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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.
Louis W. K. Yim, Anthony B. Davey, Adrian R. L. Travis, "Operating characteristics of pixelated gray-scale optically addressed spatial light modulators incorporating the twisted smectic-C* liquid crystal effect," Optical Engineering 37(8), (1 August 1998). https://doi.org/10.1117/1.601733 . Submission:
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