Camera diaphragm control method

Details Camera diaphragm control method Camera diaphragm control method

1981-07-16

1983-08-02

Perkey, William B.

G03B 902

Patent

active

043962718

ABSTRACT:
Accurate control of a movable diaphragm member of a camera in which, for each photographic exposure operation, the diaphragm member is set in motion from an initial starting position and is stopped in said motion at a prescribed position corresponding to a desired stopped down value for the photographic exposure by a movable diaphragm stopper, is performed by determining the moving speed of the diaphragm member, and using that speed determination to compute either the time remaining until the stopper should be actuated to stop the diaphragm member at a prescribed stopped down position, or the positional location of the diaphragm member at which the stopper should be actuated for that purpose.

REFERENCES:
patent: 4079386 (1978-03-01), Murakami et al.
patent: 4307948 (1981-12-01), Kitamura et al.
patent: 4311373 (1982-01-01), Kranz

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