Camera with focus detecting device for removing vignetting effec

Details Camera with focus detecting device for removing vignetting effec Camera with focus detecting device for removing vignetting effec

1995-06-07

1997-08-19

Malley, Daniel P.

Photography

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

Optical detail with photoelement system

396 89, 396 96, 396119, 396125, G03B 1336

Patent

active

056598130

ABSTRACT:
In a camera and an autofocus controlling method thereof, displacement amounts between intensity distributions of light at corresponding first and second areas of an image sensing device are detected, and a plurality of displacement detection signals are generated. A high contrast area of an object to be photographed is also detected, and a contrast detection signal corresponding to that area is produced. A focus detection signal is produced based on one of the plurality of displacement detection signals corresponding to the contrast detection signal.

REFERENCES:
patent: 4792668 (1988-12-01), Akashi et al.
patent: 4800261 (1989-01-01), Akashi
patent: 4816663 (1989-03-01), Utagawa et al.
patent: 5068682 (1991-11-01), Utagawa

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