Shutter control apparatus for a camera

Details Shutter control apparatus for a camera Shutter control apparatus for a camera

1987-07-06

1988-09-06

Adams, Russell E.

354437, 354439, 354440, G03B 708

Patent

active

047696672

ABSTRACT:
A camera shutter control apparatus comprises a detector for detecting the actual amount of opening of a camera shutter, comprised by a light emitter, a light detector, and a light controller for varying the amount of light passing therethrough from the light emitter to the light detector according to the detected amount of opening of the shutter. A controller controls the light emitter to emit a predetermined constant amount of light based on an output from the light detector. An operating device actuates the shutter in such a way to make the output of the light detector coincide with a signal representative of a predetermined shutter opening characteristic. The shutter is controlled to open and close following the predetermined characteristic defined by a shutter opening-closing program which is changeable according to the focal length of the camera lens.

REFERENCES:
patent: 4325614 (1982-04-01), Grimes
patent: 4354748 (1982-10-01), Grimes et al.
patent: 4572645 (1986-02-01), Yoshida et al.

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