Radiant energy – Invisible radiant energy responsive electric signalling – Infrared responsive
Patent
1971-05-18
1977-05-31
Nelson, Peter A.
Radiant energy
Invisible radiant energy responsive electric signalling
Infrared responsive
350 2, 250338, G01J 100
Patent
active
040271609
ABSTRACT:
Optical detectors are arranged along the focal length of a spherical mirr Signals passed by a lens and reflected by the mirror impinge on the detectors as the system scans the horizon. A reticle means is placed between the mirror and the detector to cause the optical system to discriminate against large radiating areas in the field of view of the lens. The reticle means may be straight or zig-zag opaque lines. The cross-sectional area of the lines and the area therebetween is such that radiation from point sources will impinge the detector in only one area at a time while radiation from large sources will overlap a plurality of areas. The output frequency from the detectors is indicative of the type of the radiation source.
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Driffield John B.
Kerr Howard S.
Penrose Richard M.
Stonell Anthony C.
Dunn Aubrey J.
Edelberg Nathan
Gibson Robert P.
Nelson Peter A.
The United States of America as represented by the Secretary of
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