Compensation for thermal degradation of the optical performance

Details Compensation for thermal degradation of the optical performance Compensation for thermal degradation of the optical performance

1999-06-08

2000-11-14

Perkey, W. B.

Photography

With exposure objective focusing means, focusing aid, or...

Temperature compensating

348243, 348349, G03B 1336

Patent

active

061481521

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.

REFERENCES:
patent: 4194220 (1980-03-01), Frame
patent: 4437743 (1984-03-01), Sakai et al.
patent: 4635126 (1987-01-01), Kinoshita
patent: 5815968 (1998-11-01), Dehli

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