Radiant energy – Photocells; circuits and apparatus – Optical or pre-photocell system
Patent
1984-07-13
1987-01-13
Nelms, David C.
Radiant energy
Photocells; circuits and apparatus
Optical or pre-photocell system
455614, G02F 100
Patent
active
046366369
ABSTRACT:
A battery powered optical sensor, capable of functioning for a period of time approximately equal to the shelf life of the battery, utilizes an LED driven by an optical transducer and biased by the battery at a level that exceeds the shot noise level of the LED by the dynamic range of the sensor.
REFERENCES:
patent: 3610938 (1971-10-01), Cook et al.
patent: 3903497 (1975-09-01), Stimler et al.
patent: 4247790 (1981-01-01), Sahasrabudhe et al.
patent: 4417140 (1983-11-01), Adolfsson et al.
McMahon Donald H.
Soref Richard A.
Allen Stephone
Nelms David C.
Sperry Corporation
Terry Howard P.
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