Focus detecting device

Details Focus detecting device Focus detecting device

1996-09-16

1997-09-16

Perkey, W. B.

Photography

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

Processing circuit

G03B 1336

Patent

active

056672705

ABSTRACT:
Improved accuracy is contrived in a focus detecting device for finding the amount of correlation between signals corresponding to images received on first and second sensor arrays. A picture element signal of each sensor is duplicated and taken out as a signal of a double information amount, thereby enabling correlation calculation to be effected accurately.

REFERENCES:
patent: 4523829 (1985-06-01), Eguchi et al.
patent: 4561749 (1985-12-01), Utagawa
patent: 4572476 (1986-02-01), Oinoue
patent: 4716282 (1987-12-01), Akashi et al.
patent: 4974003 (1990-11-01), Ohnuki et al.
patent: 5081479 (1992-01-01), Kadohara et al.

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