Polarization coded doublet laser detection system

Details Polarization coded doublet laser detection system Polarization coded doublet laser detection system

1975-04-21

1982-06-01

Buczinski, S. C.

Radiant energy

Photocells; circuits and apparatus

Optical or pre-photocell system

244 316, 343 7ED, 343100PE, 356364, 356369, G02F 101, G01J 400

Patent

active

043330088

ABSTRACT:
A system for locating man-made specularly reflecting objects amongst non-specular surroundings such as foliage includes apparatus to initially project orthogonally polarized laser pulses towards a given area and to then detect returned laser pulses which are polarized, while rejecting randomly polarized radiation returned from non-specular objects. In one embodiment, specularly reflecting objects are detected by providing two detectors, each sensitive to light of a different polarization, and by differentially summing their outputs to reject randomly polarized incident light.

REFERENCES:
patent: 3403394 (1968-09-01), Rouault
patent: 3562533 (1971-02-01), Doyle et al.
patent: 3689924 (1972-09-01), Caruso, Jr.
patent: 3694656 (1972-09-01), Henning
patent: 3721500 (1973-03-01), Fugitt
Skolnik, Radar Handbook, 12-1970, pp. 29-16.

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