Optical system including focal plane array compensation technique for focusing and periodically defocusing a beam
US5373151A · kind A · utility
36Cited by
6References
8Claims
0Family size
Assignee
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Key dates
| Filing date | Oct 4, 1993 |
| Grant date | Dec 13, 1994 |
| Priority date | — |
| Expiry date | Oct 4, 2013 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04N23/20
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
An imaging optical system is described including an array of photodetectors, each photodetector having a surface, and a focusing system for focusing a beam of electromagnetic infrared energy on the surface of at least one of the photodetectors. The focusing system further includes a technique for periodically defocusing the beam of electromagnetic infrared energy on the surface of at least one of the photodetectors. With such an arrangement, a scanning and focusing system is provided wherein fixed pattern noise can be decreased.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.