Television – Camera – system and detail – Optics
Reexamination Certificate
2009-06-08
2010-10-12
Ho, Tuan (Department: 2622)
Television
Camera, system and detail
Optics
Reexamination Certificate
active
07812880
ABSTRACT:
An optical apparatus is disclosed which achieves high focusing accuracy and favorable responsiveness in AF control. The apparatus includes a signal generator which extracts signals in a plurality of frequency bands from an output from an image-pickup part and generates focus signals from the extracted signals, and a controller which performs focus control such that the focus signal approaches the highest value. The controller uses a first focus signal and a second focus signal in the focus control. The second focus signal is a synthesis signal formed by synthesizing a focus signal in a relatively high or the highest frequency band of the plurality of frequency bands and a focus signal in another frequency band and contains a component of the focus signal in the relatively high or highest frequency band at a higher ratio as compared with the first focus signal.
REFERENCES:
patent: 5638122 (1997-06-01), Kawaguchi et al.
patent: 6342922 (2002-01-01), Mizoguchi
patent: 6430368 (2002-08-01), Hata
patent: 7110035 (2006-09-01), Hellstrand
patent: 2001/0045990 (2001-11-01), Yamada
patent: 2003/0030742 (2003-02-01), Ike
patent: 2004/0119871 (2004-06-01), Nobuoka
patent: 2004/0227843 (2004-11-01), Watanabe
patent: 2005/0157198 (2005-07-01), Larner et al.
patent: 1357113 (2002-07-01), None
patent: 0092850 (1983-11-01), None
patent: 0794660 (1997-09-01), None
patent: H02-140074 (1990-05-01), None
patent: 09-005621 (1997-01-01), None
patent: 2001-024931 (2001-01-01), None
patent: 2004-258208 (2004-09-01), None
patent: 2004-282780 (2004-10-01), None
patent: 2004-325517 (2004-11-01), None
patent: 0072075 (2000-11-01), None
Je-Ho Lee et al.; “Implementation of a Passive Automatic Focusing Algorithm for Digital Still Camera”; IEEE Transactions on Consumer Electronics, IEEE Service Center, New York, NY, US, vol. 41, No. 3, Aug. 1, 1995, pp. 449-454.
Communication concerning application No. 06023919.1-2202 from the European Patent Office dated Oct. 4, 2007 including extended European Search Report.
Chinese Office Action concerning Application No. 200610162564.0 dated May 23, 2008 and translation thereof.
Canon Kabushiki Kaisha
Ho Tuan
Rossi Kimms & McDowell LLP
LandOfFree
Optical apparatus does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Optical apparatus, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Optical apparatus will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-4182382