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:
Sep. 03, 2019
Filed:
Mar. 03, 2017
Canon Kabushiki Kaisha, Tokyo, JP;
Yutaka Iriyama, Saitama, JP;
CANON KABUSHIKI KAISHA, Tokyo, JP;
Abstract
In a zoom lens in which the interval between adjacent lens units changes during zooming, a magnification-varying lens group includes a lens group V having a negative refractive power and a lens unit C having a negative or positive refractive power. The lens group V includes a first magnification-varying lens group Vincluding a lens unit Vhaving a negative refractive power and a lens unit Vhaving a negative refractive power. The lens units Vand Vmove toward the image side such that the interval between the two lens units is largest at the telephoto end. The lens unit interval m1 on the optical axis between the lens units Vand Vat the wide angle end and the maximum lens unit interval m2 on the optical axis between the lens units Vand Vduring zooming are set as appropriate.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile