Focus control apparatus, image sensor, program and storage...

Details Focus control apparatus, image sensor, program and storage... Focus control apparatus, image sensor, program and storage...

2005-11-29

2005-11-29

Perkey, W. B. (Department: 2851)

Photography

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

Lens characteristic compensating

C396S102000, C396S116000, C396S133000

Reexamination Certificate

active

06970646

ABSTRACT:
A digital camera has distance measurement zone setting means (12) for dividing distance to a subject into a plurality of distance measurement zones; distance measurement zone selection means (13) for selecting a distance measurement zone to be scanned; an autofocus evaluation value calculation circuit (14) for acquiring an AF evaluation value by scanning the selected distance measurement zone; zone-update determination means (15) for determining, through use of the AF evaluation value, whether or not to update a distance measurement zone to be scanned; and in-focus position decision means (16) for appropriately updating the scanned distance measurement zone based upon the determination as to whether to update the distance measurement zone, and deciding an in-focus position based upon acquisition of AF evaluation value. A focusing lens (2) is driven to the in-focus position by a focusing-lens drive circuit (17).

REFERENCES:
patent: 4575212 (1986-03-01), Kitaura et al.
patent: 6130417 (2000-10-01), Hashimoto
patent: 6704054 (2004-03-01), Hashimoto
patent: 2003/0081137 (2003-05-01), Yamazaki
patent: 3-68280 (1991-03-01), None

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