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:
Aug. 03, 2021
Filed:
May. 29, 2020
Canon Kabushiki Kaisha, Tokyo, JP;
Yumi Takao, Nagareyama, JP;
Canon Kabushiki Kaisha, Tokyo, JP;
Abstract
An image capturing apparatus comprises an image sensor for capturing a subject image, a focus detection unit configured to, based on an image signal obtained by photoelectrically converting the subject image while performing a scan operation that causes a focus lens to move along an optical axis, calculate a focus evaluation value and detect a position of the focus lens at which the focus evaluation value is a maximum, and a calculation unit configured to, in a case where the imaging optical system includes a reflective optical system, calculate, based on information on the reflective optical system and information on an image forming position for each of a plurality of different spatial frequencies, a correction value for correcting a focus detection result of the focus detection unit.