Liquid crystal light valve having a SiO.sub.2 /TiO.sub.2 dielect

Details Liquid crystal light valve having a SiO.sub.2 /TiO.sub.2 dielect Liquid crystal light valve having a SiO.sub.2 /TiO.sub.2 dielect

1992-01-22

1993-12-21

Sikes, William L.

Optical: systems and elements

Holographic system or element

Using a hologram as an optical element

359 71, 359 72, G02F 11335, G02F 1135

Patent

active

052725545

ABSTRACT:
A liquid crystal light valve (LCLV) adapted to a large scale image projecting apparatus or an optical data processing apparatus is disclosed wherein the sectional structure is improved. The LCLV comprises a substrate, an amorphous silicon photoconductor layer formed on the substrate, a light absorbing layer and a dielectric reflection layer formed on the photoconductor layer, wherein the light absorbing layer is made up of a Si/SiO.sub.2 multilayer and the dielectric reflection layer is made up of TiO.sub.2 /SiO.sub.2. Here, the Si/SiO.sub.2 and TiO.sub.2 /SiO multilayers are integrally combined, so that the TiO.sub.2 /SiO.sub.2 multilayer is used as a dielectric mirror and the Si/SiO.sub.2 multilayer is used as a dielectric mirror and a light absorbing layer. A p-type amorphous silicon layer together with boron and hydrogen can be used as the light absorbing layer and a TiO.sub.2 /SiO.sub.2 multilayer may be used as a dielectric mirror. Accordingly, without a special bonding structure, the LCLV obtains an improved display state and a fast response speed, and facilitates a manufacturing process.

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