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. 22, 2012
Filed:
Nov. 05, 2010
Tomonori Kimura, Utsunomiya, JP;
Tomonori Kimura, Utsunomiya, JP;
Canon Kabushiki Kaisha, , JP;
Abstract
A zoom lens includes, in order from an object-side to an image-plane-side: a positive first lens unit; a negative second lens unit; a stop; a positive third lens unit; a negative fourth lens unit; and a positive fifth lens unit, wherein: during zooming, the first lens unit moves along a locus convex toward the image-plane-side, the second lens unit moves toward the image-plane-side, and the stop moves; at the telephoto end compared with the wide angle end, an interval between the first lens unit and the second lens unit increases, an interval between the second lens unit and the third lens unit decreases, and an interval between the aperture stop and the third lens unit decreases, focal lengths of the fourth lens unit, a focal length of an entire system at the telephoto end, and a movement amount of the first lens unit are appropriately set.