Image capture apparatus and focus adjustment method

Television – Camera – system and detail – Optics

Reexamination Certificate

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Details

C396S079000

Reexamination Certificate

active

07663688

ABSTRACT:
With a half press of a shutter button, a focus lens is moved from a near distance end to a far distance end of a predetermined search range, and AF evaluation values are calculated. Based on the AF evaluation values, a maximum evaluation value and a first lens position corresponding to the maximum evaluation value are detected. If the maximum evaluation value is larger than a threshold value and the first lens position is not located at the near distance end or the far distance end, the first lens position becomes an in-focus position. If the first lens position is, for example, at the near distance end, the focus lens is moved within an extended search range set on the near distance side, and the maximum evaluation value is obtained. A second lens position corresponding to the maximum evaluation value becomes the in-focus position.

REFERENCES:
patent: 6124890 (2000-09-01), Muramoto
patent: 7382411 (2008-06-01), Watanabe
patent: 7433586 (2008-10-01), Onozawa
patent: 7499096 (2009-03-01), Yamazaki
patent: 2004/0212721 (2004-10-01), Watanabe
patent: 2005/0270410 (2005-12-01), Takayama
patent: 2006/0203118 (2006-09-01), Hirai
patent: 6-160695 (1994-06-01), None

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