Infrared intrusion detector with field of view locator
US4642454A · kind A · utility
8Cited by
8References
7Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Aug 27, 1984 |
| Grant date | Feb 10, 1987 |
| Priority date | — |
| Expiry date | Aug 27, 2004 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S250/01
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
Passive infrared intrusion detector with means for determining the location of the fields of view covered by the system. In one disclosed embodiment, a small mirror is positioned near the sensing element and oriented so that a person looking at this mirror sees the fields of view through the optical system of the detector. A reference mark on the mirror appears in each of the fields seen by the person.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.