Automatic focus adjustment camera

Details Automatic focus adjustment camera Automatic focus adjustment camera

1994-06-02

1996-11-12

Gellner, Michael L.

Photography

With exposure objective focusing means, focusing aid, or...

Having accumulation photoarray and time control means

396114, 396121, 396125, G03B 1336

Patent

active

055745369

ABSTRACT:
To improve the responsiveness of an automatic focus adjustment camera in which focus adjustment of the photographic lens is performed based on the results of focus detection in multiple regions, defocus amounts of the photographic optical system in multiple focus detection regions are detected asynchronously and independently of one another in multiple focus detection regions that are established on the photographic screen of the photographic optical system. The value of the defocus amounts in the various focus detection regions are compensated at times T3, T5, T8 and T9 when the defocus amounts are detected in the various focus detection regions, or at preset time intervals W, and the final defocus amount is set from among these multiple compensated defocus amounts in order to drive the photographic optical system.

REFERENCES:
patent: 4835615 (1989-05-01), Taniguchi et al.
patent: 5130735 (1992-07-01), Kusaka et al.
patent: 5151732 (1992-09-01), Akashi et al.
patent: 5315339 (1994-05-01), Hamada et al.
patent: 5333028 (1994-07-01), Akashi et al.
patent: 5393969 (1995-02-01), Ohsawa

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