Radiant energy – Invisible radiant energy responsive electric signalling – Infrared responsive
Patent
1982-06-04
1984-09-11
Howell, Janice A.
Radiant energy
Invisible radiant energy responsive electric signalling
Infrared responsive
350438, 350 14, G01J 336, G02B 1314
Patent
active
044712227
ABSTRACT:
A bifunctional sensor is disclosed for an optical seeking system which utzes a single focussing lens arrangement for focussing light of two distinct wavelength ranges. A first detector for detecting light of the first wavelength range is provided nearest the lens system and transmits light of the second wavelength range. A second detector for detecting light of the second wavelength range is provided behind the first detector with a modulating apparatus for modulating the light of the second wavelength range before it reaches the second detector.
REFERENCES:
patent: 2360403 (1944-10-01), Dimmick
patent: 2493110 (1950-01-01), Corman
patent: 3971939 (1976-07-01), Andressen
Fowler, Jr. Eugene F.
Gibbons Robert C.
Gibson Robert P.
Hannaher Constantine
Howell Janice A.
Lane Anthony T.
Sachs Michael C.
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