Method for focus adjusting and camera

Details Method for focus adjusting and camera Method for focus adjusting and camera

2008-06-03

2008-06-03

Villecco, John M. (Department: 2622)

Television

Camera, system and detail

Optics

C348S347000, C348S356000

Reexamination Certificate

active

07382411

ABSTRACT:
A method for focus adjusting through which a subject image formed with a photographic optical system is captured by an image-capturing device and a focus match position for the photographic optical system is calculated based upon focus evaluation values calculated by using image-capturing signals includes steps for: obtaining focus evaluation values over first sampling increments in a focus adjustment range of the photographic optical system; making a decision as to whether or not a sampling position corresponding to a largest value among the focus evaluation values obtained over the first sampling increments is substantially at an end point of the focus adjustment range; obtaining focus adjustment values over second sampling increments smaller than the first sampling increments in a range that contains the end point and is smaller than the focus adjustment range if the sampling position corresponding to the largest value among the focus evaluation values is at the end point of the focus adjustment range; and calculating the focus match position based upon the focus evaluation values obtained over the second sampling increments.

REFERENCES:
patent: 6876391 (2005-04-01), Hashimoto
patent: 7098954 (2006-08-01), Suda et al.
patent: 2004/0130648 (2004-07-01), Kikuchi et al.
patent: 2005/0083428 (2005-04-01), Ohkawara
patent: 2005/0285969 (2005-12-01), Yasuda
patent: A-2001-343581 (2001-12-01), None
patent: A-2002-072073 (2002-03-01), None
patent: A-2002-311325 (2002-10-01), None
patent: WO 02/10825 (2002-02-01), None

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