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:
Dec. 24, 2013
Filed:
Feb. 23, 2010
Makoto Takamiya, Tokyo, JP;
Akihiko Nagano, Ichihara, JP;
Makoto Takamiya, Tokyo, JP;
Akihiko Nagano, Ichihara, JP;
Canon Kabushiki Kaisha, Tokyo, JP;
Abstract
A cameracomprises an image pickup elementwhich has imaging pixels performing a photoelectric conversion of an object image formed by a light beam emitted from an image pickup optical system and focus detection pixels performing a photoelectric conversion of two images formed by two divided light beams, a focus detector which obtains first and second pairs of image signals having optical base lengths different from each other from the focus detection pixels, a selector which selects one of the first and second pairs of image signals based on at least one correlation amount of the first and second pairs of image signals, and a calculator which calculates a defocus amount based on the selected pair of image signals.