Reflective chopper for infrared imaging systems
US5051591A · kind A · utility
42Cited by
3References
27Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jan 10, 1991 |
| Grant date | Sep 24, 1991 |
| Priority date | — |
| Expiry date | Jan 10, 2011 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04N23/20
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A chopper, in an infrared imaging system, is used to scatter infrared radiation from a viewed scene. This scattered radiation is detected with an infrared detector and used to produce a reference signal, which represents the uniform average radiance of the scene. This reference signal may be substracted from a signal representing the unscattered radiation emitted by the scene, to produce a signal that represents only radiance differences and that is an optimal signal for amplification.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.