Arrangement for compensating for variable speed of a camera shut

Details Arrangement for compensating for variable speed of a camera shut Arrangement for compensating for variable speed of a camera shut

1991-06-24

1993-06-15

Perkey, W. B.

G03B 7097

Patent

active

052203760

ABSTRACT:
A camera shutter system has a motor driven sector for opening and closing a shutter opening. A photo-interruptor is positioned to intercept a light beam, to effect the outputting by the photo-interruptor of a signal pulse corresponding to the speed of the shutter. A memory storing exposure data, such as a matrix memory, is accessible as a function of the speed signal and an exposure quantity that is a function of the brightness of the brightness of an object to be photographed. The accessed exposure data is modified as a function of an observed exposure quantity.

REFERENCES:
patent: 4322145 (1982-03-01), Yamada et al.
patent: 4763155 (1988-08-01), Oda et al.
patent: 4835564 (1989-05-01), Nakagawa et al.
patent: 5014082 (1991-05-01), Farrington

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