Radiant energy – Photocells; circuits and apparatus – Photocell controlled circuit
Patent
1977-08-22
1979-11-27
Nelms, David C.
Radiant energy
Photocells; circuits and apparatus
Photocell controlled circuit
250370, H01J 3150
Patent
active
041762754
ABSTRACT:
An imaging system and method in which a multi-layered device having a photoconductive insulative layer is utilized to provide an electrostatic charge image at a layer of the device in response to imaging radiation directed to the device. A scanner for scanning the device with readout radiation is used with readout electronics for converting the electrostatic charge image to electrical signals. A D.C. voltage source is used during the imaging step to impress an electric field across the device and is also used to provide an electric field across the device and support charge flow initiated by the readout radiation during the readout step. Devices using a fluid layer that absorbs x-rays to produce electrons and ions are used in the system with x-ray imaging radiation with a conductive layer that is associated with the fluid layer re-positioned closer to the photoconductive insulative layer after the electrostatic charge image has been formed.
REFERENCES:
patent: 2972082 (1961-02-01), Kallman et al.
patent: 3483320 (1969-12-01), Gebel
patent: 3970844 (1976-07-01), Fenn et al.
patent: 4085327 (1978-04-01), Swank et al.
Korn Donald M.
Nelson Owen L.
Alexander Cruzan
Marben Robert L.
Minnesota Mining and Manufacturing Company
Nelms David C.
Sell Donald M.
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