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. 16, 2007
Filed:
Dec. 27, 2004
Yusuke Ohmura, Tochigi, JP;
Yusuke Ohmura, Tochigi, JP;
Canon Kabushiki Kaisha, Tokyo, JP;
Abstract
Disclosed is a focus detecting apparatus which is capable of enlarging a focus detection region and of enhancing focus detection precision. The focus detecting apparatus includes a secondary image forming optical system for forming a plurality of light, quantity distributions related to an object image from light beams passed through different pupil regions of an objective lens, and a photoelectric transducer having a plurality of pixel lines each having a plurality of pixels aligned in a predetermined direction, each of the plurality of light quantity distributions being formed on a corresponding pixel lines of the plurality of pixel lines. The secondary image forming optical system includes a deflecting member for deflecting at least one of the plurality of light quantity distributions in a direction perpendicular to the predetermined direction, and a correcting member for correcting displacement of an image formation position in the deflection direction of the deflecting member due to wavelength dependency.