EP 0021630 A3 19810121 - OPTICS FOR INFRARED INTRUSION DETECTOR
Title (en)
OPTICS FOR INFRARED INTRUSION DETECTOR
Publication
Application
Priority
CA 329480 A 19790611
Abstract (en)
[origin: EP0021630A2] 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.
IPC 1-7
IPC 8 full level
G08B 13/18 (2006.01); G08B 13/193 (2006.01)
CPC (source: EP)
G08B 13/193 (2013.01)
Citation (search report)
- FR 2399078 A1 19790223 - HEIMANN GMBH [DE]
- US 3886360 A 19750527 - REISS MARTIN H, et al
Designated contracting state (EPC)
DE FR GB IT SE
DOCDB simple family (publication)
EP 0021630 A2 19810107; EP 0021630 A3 19810121; CA 1095302 A 19810210; JP S562091 A 19810110
DOCDB simple family (application)
EP 80301819 A 19800602; CA 329480 A 19790611; JP 7830080 A 19800610