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:
Jul. 25, 2017
Filed:
Jun. 01, 2016
Canon Kabushiki Kaisha, Tokyo, JP;
Yu Inomoto, Saitama, JP;
CANON KABUSHIKI KAISHA, Tokyo, JP;
Abstract
A zoom lens includes: a first lens unit having a negative refractive power; and a rear group having a positive refractive power, in which, when a focal length of the zoom lens is a shortest focal length, a maximum image height is lower than a half of a diagonal length of an image pickup region, and when a focal length of the zoom lens at which the maximum image height becomes a half of the diagonal length of the image pickup region is defined as an intermediate focal length, a focal length of the zoom lens at a longest focal length, a half angle of field of the zoom lens at the longest focal length, and other such factors are appropriately set so that the maximum image height is increased continuously from the shortest focal length to the intermediate focal length.