H - Electricity – 04 – N
Patent
H - Electricity
04
N
358/11, 352/53.7
H04N 5/32 (2006.01) H05G 1/00 (2006.01) G03G 13/052 (1980.01)
Patent
CA 1162332
ABSTRACT A latent charge image is recorded on and reproduced from a multilayered detector by first providing the detector with a uniform surface charge on its photoconductive layer. The photoconductive layer is then biased with an electric field whose polarity opposes that of the uniform surface charge and then the detector is exposed to a modulated radiation flux to cause at least partial discharge of the photoconductive layer. The latent charge image of the modulated radiation flux is thus stored and later read by scan- ning the surface of the photoconductive layer with a small diameter photon beam to further sequentially discharge the photoconductive layer and the chang- ing electrical potential of this sequential further discharge is detected and processed into a video signal by a processor for storage or display. The unique step of biasing the photoconductive layer with an electric field of opposite polarity to the surface charge greatly increases the efficiency of the detector, the detector's X-ray absorption efficiency, and the scan speed of the readout.
370635
Cowart Ronald W.
Marsh Lee M.
Zermeno Alfonso
Smart & Biggar
The University Of Texas System
LandOfFree
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