Shutter control device for camera

Details Shutter control device for camera Shutter control device for camera

1987-01-13

1988-08-09

Perkey, W. B.

G03B 7097

Patent

active

047631554

ABSTRACT:
A camera has a shutter device driveable to undergo opening movement to open an aperture to effect exposure operation according to a given exposure value, and a motor actuatable to rotate at an unstable rotational speed for driving the shutter device. A detector operates after the motor starts rotating and before the shutter device undergoes its opening movement for detecting the rotational speed of the motor. A controller adjusts the shutter device in accordance with the detected rotational speed of the motor to thereby enable the shutter device to effect the exposure operation so as to accurately achieve the given exposure value.

REFERENCES:
patent: 4322145 (1982-03-01), Yamada et al.
patent: 4462672 (1984-07-01), Kurosu

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