Telegraphy – Systems – Simplex-reversing periodic
Patent
1974-06-28
1976-04-27
Britton, Howard W.
Telegraphy
Systems
Simplex-reversing periodic
178DIG8, 178DIG20, H04N 702
Patent
active
039536670
ABSTRACT:
A forward looking infrared system in which the usual FLIR is augmented by the addition of active laser illumination in order to enhance the FLIR's capability to discern in a scene certain details, such as manmade objects, especially under conditions of thermal washout. The laser is coded, and appropriate decoding electronics are provided to enable the FLIR to differentiate reflected laser radiation from thermal radiation of the scene. Therefore, it is unnecessary to endeavor to increase the brightness of the laser to an extent sufficient to overwhelm the natural thermal radiance level of the scene. Both types of radiation simultaneously impinge on a common detector, thereby eliminating the necessity for dual detectors and/or dual optics, and avoiding registration problems normally associated with the use of dual components. Signal processing is available to enable a viewing of the usual FLIR information, the augmenting information, or arbitrary combinations of these, as the viewer may elect or as conditions may require.
REFERENCES:
patent: 3076961 (1963-02-01), Bibbero
patent: 3316348 (1967-04-01), Hufnagel
patent: 3467917 (1969-09-01), Patel
patent: 3558812 (1971-01-01), Beckmann
patent: 3571504 (1971-03-01), Kiuchi
patent: 3633996 (1972-01-01), Lean
patent: 3730985 (1973-05-01), Whitney
Bayston Thomas E.
Howle Robert E.
Layton Allen C.
Mendez Antonio J.
Zinn, Jr. Werner G.
Britton Howard W.
Chin Gay
Martin Marietta Corporation
Masinick Michael A.
Renfro Julian C.
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