Multispectral-staring sensor

Details Multispectral-staring sensor Multispectral-staring sensor

1995-06-16

1996-12-24

Hellner, Mark

Optics: measuring and testing

Range or remote distance finding

With photodetection

25033905, 25033914, G01C 308, G01J 502

Patent

active

055877842

ABSTRACT:
A multispectral imaging sensor. The inventive sensor (10) includes a broadband detector (30) capable of sensing electromagnetic energy across a spectra of interest. A filter arrangement (20) is mounted within the sensor in alignment with the detector (30). The sensor arrangement (20) includes a first filter (24) with a first passband, a second filter (26) with a second passband, and a mechanism for selectively positioning either the first filter (24) or the second filter (26) in optical alignment with the detector (30). In a specific embodiment, infrared and visible light are directed to the filter arrangement by a reflective optical arrangement (16, 18, 19). The positioning arrangement includes a turntable (22) on which the first filter (24) and second filter (24) are disposed. A motor (27) activates the turntable (220 from a first position at which the first filter (24) is in alignment with the detector (30) and the reflective optical arrangement (16, 18, 19) to a second position at which the second filter (26) is in alignment with the detector (30) and the optical arrangement (16, 18, 19). Multispectral imaging sensing is effected by simply switching the appropriate filter into the optical path of the detector (30).

REFERENCES:
patent: 3971939 (1976-07-01), Andressen
patent: 4009393 (1977-02-01), Ashley, Jr. et al.
patent: 4325083 (1982-04-01), Rouchon et al.
patent: 4345840 (1982-08-01), Goetz et al.
patent: 4599001 (1986-07-01), Richard
patent: 5047638 (1991-09-01), Cameron et al.

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