Camera having AF function

Television – Camera – system and detail – Optics

Reexamination Certificate

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Details

C250S201700, C250S201800, C396S096000, C396S111000, C396S125000, C396S133000

Reexamination Certificate

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07405762

ABSTRACT:
A camera having an electronic image pickup element and a distance-measuring circuit that uses light signals obtained from light images of a plurality of distance-measuring areas set in a photographing screen to select a main subject and measure the distance to the subject. The camera has a focusing component, operating when the position of the main subject cannot be identified by the distance-measuring circuit, to divide the photographing screen into a plurality of areas to identify an area in which the main subject is present on the basis of a luminance distribution obtained from the areas other than those overlapping the distance-measuring areas. The focusing component focuses a photographing lens on the position of the highest contrast signal while scanning the lens position of the photographing lens.

REFERENCES:
patent: 5353089 (1994-10-01), Yaji
patent: 5597999 (1997-01-01), Kinba et al.
patent: 5652926 (1997-07-01), Saito
patent: 6229568 (2001-05-01), Kawaguchi et al.
patent: 6763187 (2004-07-01), Shiraishi
patent: 2001/0028402 (2001-10-01), Sugimoto et al.
patent: 11-023955 (1999-01-01), None
patent: 2001-141985 (2001-05-01), None
patent: 2001-249267 (2001-09-01), None

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