Focus detection device, focusing state detection method and...

Details Focus detection device, focusing state detection method and... Focus detection device, focusing state detection method and...

2011-01-18

2011-01-18

Fuller, Rodney E (Department: 2862)

Photography

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

Reliability of focus/distance signal

C348S345000

Reexamination Certificate

active

07873267

ABSTRACT:
A focus detection device comprises: focus detection elements including light-receiving elements that generate a pair of signals corresponding to a pair of light fluxes each passing through an imaging optical system that includes a lens and an aperture stop; and a focus detector including a processor that determines a focus adjustment state of the imaging optical system with an f-number slower than a full-aperture of the imaging optical system when a specific condition is fulfilled.

REFERENCES:
patent: 4806964 (1989-02-01), Tamada et al.
patent: 4870441 (1989-09-01), Yamasaki
patent: 5231442 (1993-07-01), Kitazawa et al.
patent: 5422701 (1995-06-01), Utagawa
patent: 5532783 (1996-07-01), Kusaka
patent: 5999215 (1999-12-01), Tamura
patent: 2003/0161049 (2003-08-01), Okada et al.
patent: 2004/0057713 (2004-03-01), Ishikawa et al.
patent: 2007/0025716 (2007-02-01), Ichimiya
patent: 2007/0102619 (2007-05-01), Kusaka
patent: 2007/0154200 (2007-07-01), Utagawa et al.
patent: A-01-216306 (1989-08-01), None
patent: A-11-202193 (1999-07-01), None
patent: A-2002-250861 (2002-09-01), None
patent: A-2003-057536 (2003-02-01), None
patent: A-2006-317780 (2006-11-01), None
patent: A-2007-11314 (2007-01-01), None
patent: A-2007-33653 (2007-02-01), None
Translation of JP Publication No. 2004-093890; Projection Image Display Device; Yamauchi, Haruhiko; Publication Date: Mar. 25, 2004.

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