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:
Jan. 06, 2015
Filed:
Aug. 05, 2013
Canon Kabushiki Kaisha, Tokyo, JP;
Yosuke Eguchi, Utsunomiya, JP;
Masao Hori, Utsunomiya, JP;
Canon Kabushiki Kaisha, , JP;
Abstract
A zoom lens, including, in order from object side to image side: a positive first lens unit which does not move during zooming; a negative second lens unit for zooming; a positive third lens unit for zooming; a negative fourth lens unit which moves during zooming; and a positive fifth lens unit which does not move during zooming, in which: 0.6<|β3F|<1.0, −4.0<f4/f3<−1.0, and 20<L2w/L3w<300 are satisfied, where β3F is a lateral magnification of the third lens unit at a position at which a lateral magnification of the second lens unit becomes −1; f3 and f4 are respectively focal lengths of the third and fourth lens units; L2w is a gap between the second and third lens units at a wide angle end; and L3w is a gap between the third and fourth lens units at the wide angle end.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile