Apparatus emitting an electromagnetic radiation, in particular infrared, comprising a plane source of rays and a reflector
US4922107A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Nov 22, 1988 |
| Grant date | May 1, 1990 |
| Priority date | — |
| Expiry date | Nov 22, 2008 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG02B19/009
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
This invention relates to an apparatus emitting infrared radiation which comprises a plane source of infrared rays and a reflector. In order to avoid the problem due to captive rays and to multiple reflections, the cross section of each half-reflector located on one side of the plane of symmetry has the form of an arc of ellipse whose two foci are respectively constituted by the first end of the plane source and the first end of the target which are both located on the other side of the plane of symmetry, this arc of ellipse extending between the second end of the plane source and the point of intersection of the ellipse with the direct ray going from the first end of the plane source to the second end of the target.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.