Passive infrared sensor and obstacle detection system used in the same
US7259658B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Feb 24, 2005 |
| Grant date | Aug 21, 2007 |
| Priority date | — |
| Expiry date | Jul 29, 2025 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG08B29/046
- WIPO fieldControl
- WIPO sectorInstruments
Abstract
According to one embodiment of a passive infrared sensor, a passive infrared sensor 1 where an infrared sensing element 5 and an optical system 4 that sets a detection area A1 of the infrared sensing element 5 are covered with a cover 2. The passive infrared sensor 1 includes: a light emitting element 6 that emits infrared light from the inside of the cover 2 to the outside through the optical system 4; a reflective region 2b that is disposed outside the cover 2 and reflects at least some of the infrared light emitted from the light emitting element 6; and a light receiving element 7 that receives the infrared light reflected by the reflective region 2b, transmitted through the optical system 4 and reaching the inside of the cover 2.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.