Optical-to-optical image transducer capable of accepting...

Details Optical-to-optical image transducer capable of accepting... Optical-to-optical image transducer capable of accepting...

G - Physics

02

F

358/27

G02F 1/133 (2006.01) G02F 1/135 (2006.01)

Patent

CA 1232087

ABSTRACT A device and method for converting an X-ray image into a corresponding output image with light from a different source and a phosphorescent layer in conjunction with a liquid crystal light valve. The light valve includes a photosensor layer comprised of a deposited semiconductor material having distinct light and dark photoconductivities, the light photoconductivity being substantially greater than the dark photoconductivity. When impinged upon by an particular pattern of X rays, the phosphorescent layer phosphoresces in a corresponding pattern, which phosphorescence in turn causes the semiconductor layer to be switched to its light photoconductivity in a pattern also corresponding to that of the input X-ray image. The pattern of switched semiconductor in the photosensor layer allows a biasing voltage to be switched over to the liquid crystal layer of the light valve in a corresponding pattern. This voltage pushes the liquid crystal over its electro-optic threshold thereby inducing an output image corresponding to the original input image.

498023

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