The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Oct. 12, 2010
Filed:
Jun. 08, 2009
Seiya Ohta, Utsunomiya, JP;
Seiya Ohta, Utsunomiya, JP;
Canon Kabushiki Kaisha, , JP;
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.