Radiant energy – Photocells; circuits and apparatus – Optical or pre-photocell system
Patent
1982-09-30
1985-05-28
Nelms, David C.
Radiant energy
Photocells; circuits and apparatus
Optical or pre-photocell system
356386, G01H 2186
Patent
active
045202702
ABSTRACT:
A circuit for adjusting the sensitivity of a sensor which is used typically in document handling equipment is disclosed. A special application of the circuit relates to using a plurality of the sensors in a height-determining operation which is used in conjunction with an imaging device, which scans or images the front, for example, of a document. The height of the particular document being scanned by the imaging device is used to "scan" only as far as the height of the document so as to eliminate meaningless data from the image of the document.
REFERENCES:
patent: 4013999 (1977-03-01), Erwin et al.
patent: 4173788 (1979-11-01), Laliotis
patent: 4254469 (1981-03-01), Whitely
patent: 4318082 (1982-03-01), King
Enter Rudolf
Laverty Michael P.
Gatto James
NCR Canada Ltd - NCR Canada Ltee
Nelms David C.
Sessler Jr. Albert L.
Wargo Elmer
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