Image sensor with auxiliary light source

Details Image sensor with auxiliary light source Image sensor with auxiliary light source

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

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