Optics for infrared intrusion detector

Details Optics for infrared intrusion detector Optics for infrared intrusion detector

G - Physics

08

B

88/113.18, 340/1

G08B 13/18 (2006.01) G08B 13/193 (2006.01)

Patent

CA 1095302

ABSTRACT OF THE DISCLOSURE An infrared intrusion detector has an optical system for gathering infrared radiation from discrete sensitive regions and focusing such received radiation onto an infrared radiation sensor. The detector includes a monitoring device to sound an alarm when radiation sensed reaches a predetermined level. The optical system comprises an optical collector for gathering radiation from a field which includes the sensitive regions and for converging such radiation onto a plurality of reflectors. Each reflector determines one of the discrete sensitive regions and, in turn, is oriented to reflect converging radiation gathered from a sensitive region on the detector. The invention provides a simple, efficient optic system for a broad field of gathering infrared radiation, concentrating and focusing it in a manner to provide sufficient levels of received radiation for purposes of detection.

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