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. 27, 2015
Filed:
Jul. 30, 2014
Canon Kabushiki Kaisha, Tokyo, JP;
Kenji Shinohara, Utsunomiya, JP;
Canon Kabushiki Kaisha, Tokyo, JP;
Abstract
A zoom lens includes, in order from an object side to an image side thereof, 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 fourth lens unit having a positive refractive power. A distance between adjacent ones of the lens units changes during zooming. The first lens unit consists of, in order from the object side to the image side thereof, one negative lens element and one positive lens element. Lengths of travel M1 and M2 of the first lens unit and the second lens unit, respectively, during zooming from a wide-angle end to a telephoto end, focal lengths f1 and f2 of the first lens unit and the second lens unit, respectively, and a zoom ratio Z of the zoom lens are set appropriately.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile