Radiant energy – Photocells; circuits and apparatus – Optical or pre-photocell system
Patent
1986-04-11
1988-04-12
Nelms, David C.
Radiant energy
Photocells; circuits and apparatus
Optical or pre-photocell system
250552, 358293, H01J 4014
Patent
active
047376538
ABSTRACT:
An image sensor comprising at least one first light emitting element for irradiating an original with light, at least one photoconductive element for sensing the light via the original and at least one second light emitting element for irradiating the photoconductive element with light. The second light emitting element emits light of photoenergy smaller than the optical band gap of the photoconductive element.
REFERENCES:
patent: 3430050 (1969-02-01), Grimmeiss
patent: 4482804 (1984-11-01), Oritsuki et al.
patent: 4680644 (1987-07-01), Shirato
Hatanaka Katsunori
Komatsu Toshiyuki
Nakagawa Katsumi
Seito Shinichi
Canon Kabushiki Kaisha
Nelms David C.
Ruoff Jessica L.
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