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:
Sep. 20, 2011
Filed:
Apr. 20, 2009
Ken Wada, Sakura, JP;
Ken Wada, Sakura, JP;
Canon Kabushiki Kaisha, , JP;
Abstract
The zoom lens is a retractable bent-type zoom lens capable of providing a high zoom ratio and a reduced thickness, and capable of retracting into a camera body with an easily-configured mechanism. The zoom lens includes in order from an object side to an image side, a first lens unit having a positive refractive power, a second lens unit having a negative refractive power, a prism including a reflective surface, and a posterior lens group which includes plural lens units and has as a whole a positive refractive power. The first and second lens units are retractable into a space formed by movement of the prism in a direction orthogonal to an optical axis of the first lens unit, and, during zooming, the second lens unit and the plural lens units in the posterior lens group are moved while the first lens unit and the prism are fixed.