Visible-to-infrared converter light valve

Details Visible-to-infrared converter light valve Visible-to-infrared converter light valve

1976-12-22

1978-09-19

Bauer, Edward S.

350341, 350342, 350347, G02F 113

Patent

active

041149912

ABSTRACT:
There is disclosed a reflective type liquid crystal light valve means for converting a visible wavelength dynamic image to an infrared wavelength dynamic image. The device employs an infrared reflecting and visible transmitting indium-tin-oxide film which is external to the liquid crystal layer and active films and which also serves as a conductive electrode for the device. In operation, a visible image is transmitted through a visible transmitting faceplate and through this ITO film to a photosensor to modify its impedance. An infrared projection beam is transmitted through a second infrared transmissive faceplate, through the liquid crystal means and the photosensor to the IR reflective dichroic film and thence back through the rest of the liquid crystal cell for projection.

REFERENCES:
patent: 3939346 (1976-02-01), Tutihashi
patent: 3976361 (1976-08-01), Fraas et al.

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