Automatic focus adjusting device in camera system

Details Automatic focus adjusting device in camera system Automatic focus adjusting device in camera system

1994-10-28

1999-08-31

Perkey, W. B.

Photography

Having variable focal length of camera objective

Having focus operation

G03B 1336

Patent

active

059465042

ABSTRACT:
An automatic focus adjusting device in a camera system includes a focus detecting circuit for a focusing state of an object image formed on an image plane by a photographic lens, a control circuit for producing a control signal on the basis of an output of the focus detecting circuit and for outputting the control signal to the photographic lens to control the same, and a characteristic detecting circuit for detecting a predetermined optical characteristic of the photographic lens. The control circuit is arranged to transmit the control signal to the photographic lens by defining as a parameter a change of the optical characteristic detected by the characteristic detecting circuit.

REFERENCES:
patent: 4740064 (1988-04-01), Kono et al.
patent: 4748509 (1988-05-01), Otake et al.
patent: 4885600 (1989-12-01), Iwasa et al.

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