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:
May. 10, 2022
Filed:
Feb. 19, 2020
Canon Kabushiki Kaisha, Tokyo, JP;
Kohei Kimura, Saitama, JP;
CANON KABUSHIKI KAISHA, Tokyo, JP;
Abstract
Provided is a zoom lens consisting of, in order from object side to image side, a positive first lens unit, a negative second lens unit, a positive third lens unit and a rear lens group including a plurality of lens units in which intervals between adjacent lens units are changed during zooming. The first lens unit does not move during zooming. The third lens unit moves toward object side during zooming from wide angle end to telephoto end. The first lens unit includes three or more positive lenses. A focal length of zoom lens at wide angle end, a focal length of first lens unit, a distance from a lens surface closest to object side to an image plane, a back focus at wide angle end, and a focal length of a positive lens having a smallest refractive power among positive lenses included in first lens unit are appropriately set.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile