GB8711609D0 - Optical detector - Google Patents
Optical detectorInfo
- Publication number
- GB8711609D0 GB8711609D0 GB878711609A GB8711609A GB8711609D0 GB 8711609 D0 GB8711609 D0 GB 8711609D0 GB 878711609 A GB878711609 A GB 878711609A GB 8711609 A GB8711609 A GB 8711609A GB 8711609 D0 GB8711609 D0 GB 8711609D0
- 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.)
- Pending
Links
Priority Applications (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB878711609A GB8711609D0 (en) | 1987-05-16 | 1987-05-16 | Optical detector |
GB08811153A GB2205156A (en) | 1987-05-16 | 1988-05-11 | Optical detector |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB878711609A GB8711609D0 (en) | 1987-05-16 | 1987-05-16 | Optical detector |
Publications (1)
Publication Number | Publication Date |
---|---|
GB8711609D0 true GB8711609D0 (en) | 1987-06-24 |
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GB08811153A Withdrawn GB2205156A (en) | 1987-05-16 | 1988-05-11 | Optical detector |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 After (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB08811153A Withdrawn GB2205156A (en) | 1987-05-16 | 1988-05-11 | Optical detector |
Country Status (1)
Country | Link |
---|---|
GB (2) | GB8711609D0 (en) |
Families Citing this family (5)
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)
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 |
-
1987
- 1987-05-16 GB GB878711609A patent/GB8711609D0/en active Pending
-
1988
- 1988-05-11 GB GB08811153A patent/GB2205156A/en not_active Withdrawn
Also Published As
Publication number | Publication date |
---|---|
GB8811153D0 (en) | 1988-06-15 |
GB2205156A (en) | 1988-11-30 |
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