Liquid crystal cells – elements and systems – Liquid crystal system – Computational system employing liquid crystal element
Patent
1993-07-30
1998-11-24
Sikes, William L.
Liquid crystal cells, elements and systems
Liquid crystal system
Computational system employing liquid crystal element
349 25, 349177, 359561, 359279, 382211, 382278, C02F 1135, C02F 1137, G06K 976
Patent
active
058414894
ABSTRACT:
In a spatial light modulator of the present invention, a photoconductive layer formed of photoconductive material receives write light having a spatial distribution in its intensity and changes resistivity of the photoconductive material dependently on the spatial distribution in the intensity of the received write light. A liquid crystal layer formed of liquid crystal molecules of nematic phase receives read light and presents birefringence with respect to the received read light. An electric voltage is applied through the photoconductive layer and the liquid crystal layer to thereby produce an electric field in the liquid crystal layer. The photoconductive layer changes the electric field produced in the liquid crystal layer in accordance with the resistivity of the photoconductive material so as to electrically control the birefringence of the liquid crystal molecules. The liquid crystal layer modulates the received read light in accordance with the birefringence which is electrically controlled in accordance with the spatial distribution in the intensity of the write light received by the photoconductive layer.
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Hara Tsutomu
Hori Terushige
Kobayashi Yuji
Mukohzaka Naohisa
Toyoda Haruyoshi
Duong Tai V.
Hamamatsu Photonics K.K.
Sikes William L.
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