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. 13, 2014
Filed:
Jan. 08, 2013
Canon Kabushiki Kaisha, Tokyo, JP;
Ken Wada, Sakura, JP;
Canon Kabushiki Kaisha, Tokyo, JP;
Abstract
A zoom lens includes a front lens group including a first lens unit and a second lens unit, a reflecting mirror configured to bend an optical path, and a rear lens group including two or more lens units. When the zoom lens is retracted, the reflecting mirror performs at least one of rotation and linear movement to provide space for the front lens group. A focal length of a lens unit having the highest absolute value of refractive power among negative lens units in the front lens group, a focal length of the entire zoom lens at a telephoto end, a maximum value and a minimum value of amounts of movement of the at least two lens units in the rear lens group during zooming, a length of a reflecting surface of the reflecting mirror, and a maximum effective diameter of the first lens unit are appropriately set.