Object detection system

Details Object detection system Object detection system

1992-02-07

1993-11-23

Hellner, Mark

Optics: measuring and testing

By polarized light examination

359371, 359407, 359501, 250330, 250342, G01J 400, G01J 101

Patent

active

052649164

ABSTRACT:
A device will detect man-made objects by using a polarizer. The polarizer rotates about an axis in front of a lens array. The rotation of the polarizer alternately polarizes light received in proportion to the speed of rotation. This produces flashing in intensity for detecting the object as well as background rejection due to its lack of polarization. A man-made object having both horizontal and vertical surfaces of a type that will reflect light that can be polarized will provide flashing through the lens array as the polarizer passes through horizontal and vertical position. On the other hand, backgrounds don't have polarized components and won't flash. Attention is drawn to the man-made target. The background can also be electronically eliminated from the observed scene, permitting precise lock-on to the target.

REFERENCES:
patent: 3549259 (1967-12-01), Klatchko
patent: 4202601 (1980-05-01), Burbo et al.
patent: 4601552 (1986-07-01), Jessmore
patent: 5138162 (1992-08-01), Hacskaylo

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