Room-temperature filtering for passive infrared imaging
US9121760B2 · kind B2 · utility
5Cited by
16References
19Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Aug 10, 2010 |
| Grant date | Sep 1, 2015 |
| Priority date | — |
| Expiry date | Jan 1, 2033 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01J2005/0077
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A device, for imaging infrared radiation from a scene, includes a detector of the infrared radiation, an enclosure for keeping the detector at an operating temperature thereof, an optical system, outside the enclosure, for focusing the infrared radiation onto the detector via a window of the enclosure, and a filter. In one embodiment, the filter is positioned at an intermediate focal plane of the optical system. In another embodiment, the filter is on a surface of an optical element of the optical system and has a defocusing relationship to the detector.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.