Facsimile and static presentation processing – Facsimile – Recording apparatus
Patent
1985-03-20
1987-06-23
Rubinson, Gene Z.
Facsimile and static presentation processing
Facsimile
Recording apparatus
H04N 314
Patent
active
046757392
ABSTRACT:
An incident radiation sensing apparatus comprises an array of photosensitive elements formed as an integrated circuit on a substrate. Each of the photosensitive elements includes a capacitor for storing charge, a conductive means for charging the capacitor to a preselected magnitude, a blocking means for inhibiting the discharge of charge stored on the capacitor; and a photoresponsive means formed from deposited semiconductor material for generating charge carriers at a rate responsive to the intensity of radiation incident upon the photoresponsive means. The photoresponsive means is connected to the capacitor so that the charge carriers generated in the photoresponsive means reduce the magnitude of the charge on the capacitor as a function of the magnitude of, and the time incidence of, the incident radiation. The apparatus further includes means for sensing the magnitude of charge remaining on the capacitor of a given photosensitive element a preselected period of time after its charging by the conductive means, so as to produce a signal corresponding to the time integral of the magnitude of the incident radiation impinging on the photoresponsive means connected to that capacitor during the preselected period of time. The present invention includes using such a radiation sensor in X-ray imagers, contact-type document copiers, and electronic cameras.
REFERENCES:
patent: 3562418 (1971-02-01), Glusick et al.
patent: 4226898 (1980-10-01), Ovshinsky et al.
patent: 4346406 (1982-08-01), Kato et al.
patent: 4482804 (1984-11-01), Oritsuki et al.
Cannella Vincent D.
Catchpole Clive
Keem John
Swartz Louis D.
Yaniv Zvi
Brinich Stephen
Energy Conversion Devices Inc.
Goldman R. M.
Nolan R. S.
Rubinson Gene Z.
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