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:
Oct. 31, 2017
Filed:
Jul. 25, 2016
Canon Kabushiki Kaisha, Tokyo, JP;
Kenji Shinohara, Utsunomiya, JP;
CANON KABUSHIKI KAISHA, Tokyo, JP;
Abstract
A zoom lens according to the present invention includes, in order from an object side to an image side: a first lens unit having a negative refractive power; a second lens unit having a positive refractive power; and a third lens unit having a positive refractive power, in which a distance between adjacent lens units varies during zooming, the configuration of the second lens unit, the curvature radius Rbobj of a lens surface of a cemented lens GRbon the object side included in the second lens unit, the curvature radius Rbimg of a lens surface of the cemented lens GRbon the image side, the focal length f2img of the cemented lens GRband the focal length fof the second lens unit are appropriately set.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile