Spatial light modulator element with amorphous film of germanium

Details Spatial light modulator element with amorphous film of germanium Spatial light modulator element with amorphous film of germanium

1993-01-28

1995-11-28

Gross, Anita Pellman

Optical: systems and elements

Holographic system or element

Using a hologram as an optical element

359 72, G02F 11335, G02F 1135

Patent

active

054713315

ABSTRACT:
A spatial light modulator includes at least a photoconductive layer, one transparent electrode film provided on one surface of the photoconductive layer, a light blocking layer provided on the other surface of the photoconductive layer, a dielectric multilayered film provided on the light blocking layer, a light modulation layer provided on the dielectric multilayered film, and the other transparent electrode film provided on the surface of the light modulation layer, said light modulation layer consisting of a liquid crystal material for changing intensity, phase or running direction of read-out light by applying a voltage, wherein the light blocking layer is an amorphous film consisting essentially of 5-45 atomic % of germanium, 17.5-92.5 atomic % of carbon and 2.5-77.5 atomic % of silicon. Thereby, the magnification of the intensity of read-out light to intensity of write-in light can be increased.

REFERENCES:
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patent: 5148298 (1992-09-01), Shigeta et al.
patent: 5178445 (1993-01-01), Moddel et al.
patent: 5260815 (1993-11-01), Takizawa
patent: 5272554 (1993-12-01), Ji et al.
Takizawa et al., "Transmission mode spatial light modulator using a Bi.sub.12 SiO.sub.20 crystal and polymer-dispersed liquid-crystal layers", Appl. Phys. Lett., vol. 56, No. 11, (Mar. 1990), pp. 999-1001.
T. D. Beard et al., "AC Liquid-Crystal Light Valve", Appl. Phys. Lett. vol. 22, No. 3 (Feb. 1, 1973), pp. 90-92.

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