Compensation for thermal degradation of the optical performance in a digital imaging system
US6249647A · kind A · utility
5Cited by
5References
2Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Aug 16, 2000 |
| Grant date | Jun 19, 2001 |
| Priority date | — |
| Expiry date | Aug 16, 2020 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG02B27/0068
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A system for thermal compensation of the optical performance of a lens system in a digital imaging device can improve the performance of the digital imaging system. The dark current from the photosensor is used to measure the temperature of the lens system. The digital processing system can use the temperature information to correct for aberrations in the lens system caused by changes in temperature. The focus function can use the temperature information to more accurately position the lens for optimum focus.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.