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:
Sep. 01, 2009
Filed:
Jul. 27, 2007
Isao Nakazawa, Zama, JP;
Isao Nakazawa, Zama, JP;
Canon Kabushiki Kaisha, Tokyo, JP;
Abstract
A focus detection apparatus comprising a focus detection unit adapted to employ a photoelectric conversion element to detect a relative positional relationship between a pair of object images corresponding to a focus detection field; and wherein the focus detection unit are switchable between a first mode of operation in which such an object image corresponding to a focus detection field is detected by using a first number of areas of the photoelectric conversion element, and a second mode of operation in which such an object image corresponding to a focus detection field is detected by using a second number of areas of the photoelectric conversion element, different from the first number.
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