Radiant energy – Source with recording detector – Including a light beam read-out
Patent
1994-06-22
1996-04-23
Fields, Carolyn E.
Radiant energy
Source with recording detector
Including a light beam read-out
250580, G01N 2304
Patent
active
055106269
ABSTRACT:
A system and method for conditioning a photoconductive radiation detector achieve charge redistribution within a photoconductive layer without the need for charge removal or charge injection techniques. A first conditioning voltage is applied across the detector to establish a first electric field. The first electric field is reversed relative to fields applied to the detector during image exposure and image read-out operations. While the first conditioning voltage is maintained, the photoconductive layer is exposed for a period of time to first conditioning radiation having one or more wavelengths selected to penetrate at least a portion of the photoconductive layer. A second conditioning voltage, less than the first conditioning voltage, then can be optionally applied across the detector to establish a forward bias electric field. While the second conditioning voltage is maintained, the photoconductive layer is exposed for a period of time to second, broad spectrum conditioning radiation. The detector can then be placed in a dark environment for a period of time, in a shorted condition, to dark-adapt the photoconductive layer.
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Arimilli Padmanabham A.
Cook Earl L.
Edwards Jathan D.
Nelson Owen L.
Fields Carolyn E.
Griswold Gary L.
Kirn Walter N.
Minnesota Mining and Manufacturing Company
Shumaker Steven J.
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