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:
Mar. 21, 2017
Filed:
Aug. 27, 2015
Applicant:
Canon Kabushiki Kaisha, Tokyo, JP;
Inventor:
Minoru Hirose, Kawasaki, JP;
Assignee:
Canon Kabushiki Kaisha, Tokyo, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H04N 5/335 (2011.01); H04N 5/232 (2006.01); G02B 7/36 (2006.01); G03B 13/36 (2006.01); H04N 5/235 (2006.01); G02B 7/10 (2006.01);
U.S. Cl.
CPC ...
H04N 5/23212 (2013.01); G02B 7/102 (2013.01); G02B 7/36 (2013.01); G03B 13/36 (2013.01); H04N 5/2351 (2013.01);
Abstract
Disclosed is a focus-detection device capable of performing phase-difference detection type focus detection using outputs of an image sensor, and a method for controlling the same. Phase differences between image signals each of which based on a light beam that has passed through different partial regions of an exit pupil of an imaging optical system, and an image signal based on a light beam that has passed through the entire region of the exit pupil is detected. Then, a defocus amount of the imaging optical system is computed using the sum of the phase differences.