Focus adjusting apparatus, camera including the same, and...

Details Focus adjusting apparatus, camera including the same, and... Focus adjusting apparatus, camera including the same, and...

2011-07-19

2011-07-19

Perkey, W. B. (Department: 2862)

Photography

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

Plural focusing or rangefinding areas

Reexamination Certificate

active

07983550

ABSTRACT:
A focus adjusting apparatus includes an imaging unit, a calculation unit, a detection unit, and a control unit. The imaging unit is configured to generate an imaging signal of an image formed by an optical system. The calculation unit is configured to calculate based on the imaging signal a focus evaluation value in accordance with a focus adjustment position of the optical system. The detection unit is configured to detect a state with respect to a size of the image. The control unit is configured to control focus adjustment of the optical system based on a rate of change in the focus evaluation value and the state with respect to the size of the image.

REFERENCES:
patent: 5422673 (1995-06-01), Kondo et al.
patent: 7747158 (2010-06-01), Ueda
patent: 2007/0030381 (2007-02-01), Maeda
patent: 2007/0296848 (2007-12-01), Terashima
patent: 2010/0201864 (2010-08-01), Takayama
patent: 2003-121721 (2003-04-01), None

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