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:
Feb. 20, 2018
Filed:
Oct. 13, 2015
Canon Kabushiki Kaisha, Tokyo, JP;
Yuichi Gyoda, Utsunomiya, JP;
CANON KABUSHIKI KAISHA, Tokyo, JP;
Abstract
An optical system includes an aperture stop, a unit A configured to move during a distortion adjustment, and a unit B disposed at an image side relative to the unit A and configured to move with a locus different from a locus of the unit A during the distortion adjustment, the optical system changes from a first optical state having a first distortion to a second optical state having a second distortion larger than the first distortion, and focal lengths of the units A and B, moving amounts of the units A and B during a change from the first to second optical states, distances from the aperture stop to the units A and B, distances from a lens surface of the unit A closest to the object side to an image plane, and a total optical length of the optical system satisfy a predetermined condition.