发明名称 |
Infrared intrusion detector and optical system for such a detector. |
摘要 |
An infrared instrusion detector has an otpical 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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申请公布号 |
EP0021630(A2) |
申请公布日期 |
1981.01.07 |
申请号 |
EP19800301819 |
申请日期 |
1980.06.02 |
申请人 |
ISOTEC INDUSTRIES LIMITED |
发明人 |
TURLEJ, ZBIGNIEW W.;HAWKEN, DONALD FREDERICK |
分类号 |
G08B13/18;G08B13/193;(IPC1-7):G08B13/18 |
主分类号 |
G08B13/18 |
代理机构 |
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