Diaphragm control device for a camera

Details Diaphragm control device for a camera Diaphragm control device for a camera

1995-06-15

1996-10-22

Mathews, A. A.

Photography

Exposure control circuit

Diaphragm function only

396505, 396358, G03B 902, G03B 1912

Patent

active

055682138

ABSTRACT:
A diaphragm control device for a camera capable of controlling a diaphragm member with a high level of precision is disclosed. The camera and diaphragm control device are equipped with a mirror member that moves from the down position to the up position during shooting of a subject, a mirror driving device to drive the mirror member, a diaphragm mechanism connected with the mirror member to control light rays from the subject, a diaphragm driving device to drive the diaphragm mechanism, a stopping device to stop the diaphragm driving device, and a control device to control the diaphragm driving device and the stopping device to stop the diaphragm mechanism at about a predetermined position. A correction device correct changes in the stopping characteristics of the stopping device to precisely stop the diaphragm mechanism at the predetermined position.

REFERENCES:
patent: 4443083 (1984-04-01), Nokano
patent: 4579439 (1986-04-01), Takahata
patent: 4841327 (1989-06-01), Yamamoto et al.
patent: 5349405 (1994-09-01), Itabashi et al.

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