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. 03, 2014
Filed:
Oct. 26, 2012
Canon Kabushiki Kaisha, Tokyo, JP;
Masanori Ishikawa, Saitama, JP;
Seiichi Kashiwaba, Utsunomiya, JP;
Atsushi Koyama, Utsunomiya, JP;
Masayasu Mizushima, Utsunomiya-shi, JP;
Hirokazu Shukuin, Shioya-gun, JP;
Canon Kabushiki Kaisha, , JP;
Abstract
An optical apparatus includes a first driver configured to drive a focus lens unit in autofocusing, a second driver configured to drive the focus lens unit in the autofocusing, a first detector configured to detect a driving amount of the first driver, a second detector configured to detect a driving amount of the second driver, a memory configured to store a relationship between information of detection results of the first and second detectors, and an object distance as a distance from the optical apparatus to an object, and a controller configured to obtain information of the object distance based upon the relationship stored in the memory and the detection results of the first and second detectors.