Optical: systems and elements – Having significant infrared or ultraviolet property – Having folded optical path
Patent
1990-12-13
1992-11-03
Dzierzynski, Paul M.
Optical: systems and elements
Having significant infrared or ultraviolet property
Having folded optical path
359353, 359357, 359420, 359634, 359722, 359731, 359859, 244 316, G02B 1314, G02B 1708
Patent
active
051610515
ABSTRACT:
An optical system (10) for producing dual fields of view simultaneously. The system (10) includes a first optical system (12) for producing a first field of view image and a second optical system (36) for producing a second field of view image where the angular displacement of the second field of view is different from that of the first field of view. A dichroic beamsplitter (22) is disposed in the present invention so as to reflect light from the first optical system (12). The dichroic beamsplitter (22) is also disposed so as to simultaneously transmit light from the second optical system (36). As a result, the reflected light (20) is primarily composed of light of a first wavelength band and the transmitted light is primarily composed of a second wavelength band. The light from the two different fields of view are then directed to a dual filter (32) which passes the first wavelength band in one portion and passes the second wavelength band in another portion. Light passing through the dual filter (32) may then be focused onto a sensor (34) which will then detect the first field of view image on one area and simultaneously detect the second field of view image on another area.
REFERENCES:
patent: 4354742 (1982-10-01), Abel et al.
patent: 4453800 (1984-06-01), Fjeldsted
patent: 4877317 (1989-10-01), Gibbons et al.
patent: 4950056 (1990-08-01), Smith
patent: 5022723 (1991-06-01), Schmidt et al.
Cameron Bruce A.
Whitney Colin G.
Brown C. D.
Denson-Low W. K.
Dzierzynski Paul M.
Heald R. M.
Hughes Aircraft Company
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