GB8811153D0 - Optical detector - Google Patents

Optical detector

Info

Publication number
GB8811153D0
GB8811153D0 GB888811153A GB8811153A GB8811153D0 GB 8811153 D0 GB8811153 D0 GB 8811153D0 GB 888811153 A GB888811153 A GB 888811153A GB 8811153 A GB8811153 A GB 8811153A GB 8811153 D0 GB8811153 D0 GB 8811153D0
Authority
GB
United Kingdom
Prior art keywords
optical detector
detector
optical
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Withdrawn
Application number
GB888811153A
Other versions
GB2205156A (en
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
WILD G
Original Assignee
WILD G
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by WILD G filed Critical WILD G
Publication of GB8811153D0 publication Critical patent/GB8811153D0/en
Publication of GB2205156A publication Critical patent/GB2205156A/en
Withdrawn legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G08—SIGNALLING
    • G08B—SIGNALLING OR CALLING SYSTEMS; ORDER TELEGRAPHS; ALARM SYSTEMS
    • G08B13/00—Burglar, theft or intruder alarms
    • G08B13/18—Actuation by interference with heat, light, or radiation of shorter wavelength; Actuation by intruding sources of heat, light, or radiation of shorter wavelength
    • G08B13/189—Actuation by interference with heat, light, or radiation of shorter wavelength; Actuation by intruding sources of heat, light, or radiation of shorter wavelength using passive radiation detection systems
    • G08B13/19—Actuation by interference with heat, light, or radiation of shorter wavelength; Actuation by intruding sources of heat, light, or radiation of shorter wavelength using passive radiation detection systems using infrared-radiation detection systems
    • G08B13/193—Actuation by interference with heat, light, or radiation of shorter wavelength; Actuation by intruding sources of heat, light, or radiation of shorter wavelength using passive radiation detection systems using infrared-radiation detection systems using focusing means

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Photometry And Measurement Of Optical Pulse Characteristics (AREA)
  • Burglar Alarm Systems (AREA)
GB08811153A 1987-05-16 1988-05-11 Optical detector Withdrawn GB2205156A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB878711609A GB8711609D0 (en) 1987-05-16 1987-05-16 Optical detector

Publications (2)

Publication Number Publication Date
GB8811153D0 true GB8811153D0 (en) 1988-06-15
GB2205156A GB2205156A (en) 1988-11-30

Family

ID=10617462

Family Applications (2)

Application Number Title Priority Date Filing Date
GB878711609A Pending GB8711609D0 (en) 1987-05-16 1987-05-16 Optical detector
GB08811153A Withdrawn GB2205156A (en) 1987-05-16 1988-05-11 Optical detector

Family Applications Before (1)

Application Number Title Priority Date Filing Date
GB878711609A Pending GB8711609D0 (en) 1987-05-16 1987-05-16 Optical detector

Country Status (1)

Country Link
GB (2) GB8711609D0 (en)

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4333707C2 (en) * 1993-10-02 1996-12-05 Insta Elektro Gmbh & Co Kg Passive infrared motion detector
US5414255A (en) * 1993-11-08 1995-05-09 Scantronic Limited Intrusion detector having a generally planar fresnel lens provided on a planar mirror surface
DE19822053B4 (en) * 1998-05-16 2007-01-18 Insta Elektro Gmbh Fresnel lens arrangement for passive infrared motion detectors
US6678097B2 (en) * 2001-05-04 2004-01-13 Honeywell International Inc. Non-planar fresnel reflector arrays, mold structures and mold patterns for eliminating negative draft during molding
DE20108545U1 (en) * 2001-05-22 2002-09-26 Merten GmbH & Co. KG, 51674 Wiehl Mask for a motion detector

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4321594A (en) * 1979-11-01 1982-03-23 American District Telegraph Company Passive infrared detector
US4275303A (en) * 1979-11-13 1981-06-23 Arrowhead Enterprises, Inc. Passive infrared intrusion detection system
US4460829A (en) * 1982-05-17 1984-07-17 Cerberus Ag Infrared intrusion detector with response indicator light
GB2124363B (en) * 1982-07-27 1985-12-18 I R Systems Ltd Intruder detector
GB2173013A (en) * 1985-03-29 1986-10-01 Philips Electronic Associated Arrays of lenses

Also Published As

Publication number Publication date
GB8711609D0 (en) 1987-06-24
GB2205156A (en) 1988-11-30

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Legal Events

Date Code Title Description
WAP Application withdrawn, taken to be withdrawn or refused ** after publication under section 16(1)