Method and apparatus for optically detecting and identifying...

Radiant energy – Photocells; circuits and apparatus – Optical or pre-photocell system

Reexamination Certificate

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C250S216000, C359S291000, C359S298000

Reexamination Certificate

active

07432498

ABSTRACT:
An optical detection apparatus includes a housing having a circumferential opening therein. A primary mirror reflects light rays to form a first set of light rays to a secondary mirror that has a generally concave shape coupled to the housing. A tertiary mirror having a generally concave shape coupled to the housing spaced apart from the secondary mirror directs light to detection optics that form an image using the third set of light rays. The detection optics include a micro-mirror array that redirect the image to a detector. A controller controls the micro-mirror array and determines an event characteristic based upon the image thereon.

REFERENCES:
patent: 6876483 (2005-04-01), Svec et al.
patent: 2002/0088942 (2002-07-01), Metcalf et al.
patent: 2006/0018651 (2006-01-01), Cho et al.
S.P. Carfagno, “Spectral Characteristics of Muzzle Flash,” AMCP-706-255, U.S. Army Material Command, AD-818 532, Jun. 1967.
David B. Law et al., “Multispectral Signature Analysis Measurements of Selected Sniper Rifles and Small Arms,” SPIE Proceedings, vol. 2938, pp. 288-298, 1997.

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