Liquid crystal light valve with amorphous silicon photoconductor

Details Liquid crystal light valve with amorphous silicon photoconductor Liquid crystal light valve with amorphous silicon photoconductor

1992-02-19

1993-08-24

Heyman, John S.

Optical: systems and elements

Holographic system or element

Using a hologram as an optical element

430 84, G02F 11335, G03G 1508

Patent

active

052393976

ABSTRACT:
A photoconductor coupled liquid crystal light valve comprising a photoconductor layer, a liquid crystal layer and electrodes for applying voltage to the layers. The photoconductive layer is made of amorphous silicon containing hydrogen and/or halogen at more than 40 at%. The photoconductive layer preferably has a resistivity of between 10.sup.11 and 10.sup.12 ohm-cm and a photonconductivity of 10.sup.-8 and 10.sup.-6 cm.sup.2 /V. The photoconductive layer is preferably formed by electron cyclotron resonance.

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