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:
Jun. 20, 2017
Filed:
Feb. 18, 2015
Applicant:
Canon Kabushiki Kaisha, Tokyo, JP;
Inventor:
Minoru Uchiyama, Utsunomiya, JP;
Assignee:
CANON KABUSHIKI KAISHA, Tokyo, JP;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
H04N 5/232 (2006.01); G03B 13/36 (2006.01); G03B 3/10 (2006.01);
U.S. Cl.
CPC ...
G03B 13/36 (2013.01); G03B 3/10 (2013.01); H04N 5/23212 (2013.01); G03B 2205/0046 (2013.01);
Abstract
A controller controls a focus lens driver so as to maintain an in-focus state associated with a magnification variation, based on information on a tracking curve that represents a position of the focus lens corresponding to an object distance and a focal length of an image-pickup optical system. The controller controls the focus lens driver so as to prevent the focus lens from being moved for focusing based on a difference between an actual position of the focus lens and the position of the focus lens indicated by the tracking curve in a case the focus lens driver is driving the focus lens based on information on the tracking curve.