Image-pickup apparatus and focus control method for the same

Details Image-pickup apparatus and focus control method for the same Image-pickup apparatus and focus control method for the same

2007-07-10

2010-11-09

Ometz, David L (Department: 2622)

Television

Camera, system and detail

Optics

C348S348000, C348S353000, C348S349000, C348S350000, C396S125000

Reexamination Certificate

active

07830445

ABSTRACT:
An image-pickup apparatus is disclosed which can prevent focus control from being performed on the basis of incorrect information on an object distance externally measured. The image-pickup apparatus includes a first detector which produces first information corresponding to a contrast state of a picked-up image, a second detector which receives light from an object to detect second information corresponding to a distance to the object, and a controller which performs focus control by using the first information and the second information. The controller performs the focus control by using the first information without using the second information when a light-receiving luminance level in the second detector is lower than a first value.

REFERENCES:
patent: 5534965 (1996-07-01), Higaki et al.
patent: 7499097 (2009-03-01), Onozawa
patent: 2005/0088538 (2005-04-01), Nozaki et al.
patent: 2005/0185086 (2005-08-01), Onozawa
patent: 2006/0072032 (2006-04-01), Kaneda
patent: 2006/0109370 (2006-05-01), Yamazaki
patent: 1661458 (2005-08-01), None
The above references were cited in a Feb. 27, 2009 Chinese Office Action that issued in Chinese Patent Application No. 200710129772.5, which is enclosed with English Translation.

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