Passive infrared movement detector
US4606600A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Dec 26, 1984 |
| Grant date | Aug 19, 1986 |
| Priority date | — |
| Expiry date | Dec 26, 2004 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S250/01
- WIPO fieldControl
- WIPO sectorInstruments
Abstract
In a passive infrared movement detector having a reflector which directs the radiation from a plurality of fields of vision to an infrared detector arrangement and for this purpose consists of a plurality of individual reflectors, the reflecting surface of the reflector is composed of a plurality of facets produced at the reflector. The disadvantages of such a reflector are in particular to be seen in the fact that for each required distance range of the passive infrared movement detector a reflector adapted thereto must be used. Furthermore, the production of such a reflector is relatively expensive. In order to avoid these disadvantages, the individual reflectors are proposed to be in the form of spherical reflectors which are arranged on a reflector carrier in a manner so as to be shiftable in different directions and lockable in adjusted positions.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.