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. 15, 2009
Filed:
Nov. 26, 2008
Tomonori Kimura, Utsunomiya, JP;
Tomonori Kimura, Utsunomiya, JP;
Canon Kabushiki Kaisha, Tokyo, JP;
Abstract
A 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 third lens unit having a positive refractive power, and a rear lens unit including one or more lens units and having an overall positive refractive power. In the zoom lens, the third lens unit includes a first subunit having a positive refractive power and including one lens component having a positive refractive power, an aperture stop, and a second subunit including a negative lens. In the third lens unit of the zoom lens, a focal length of each of the first subunit and the second subunit is appropriately set.