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. 01, 2016
Filed:
Mar. 07, 2014
Canon Kabushiki Kaisha, Tokyo, JP;
Yasuaki Hagiwara, Utsunomiya, JP;
CANON KABUSHIKI KAISHA, Tokyo, JP;
Abstract
A zoom lens includes: a first lens unit having a positive refractive power; a second lens unit having a negative refractive power; a third lens unit having a positive refractive power; and a rear unit having two or more lens units, in the order from an object side to an image side, an interval between the adjacent lens units being changed in order to carry out at least one of zooming and focusing, wherein the rear unit includes a focus lens unit that has a negative refractive power and that moves during the focusing, and wherein, when the zoom lens focuses on a specific object distance, the focus lens unit moves integral with the other lens unit during zooming.