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:
Mar. 10, 2015
Filed:
Jul. 15, 2013
Canon Kabushiki Kaisha, Tokyo, JP;
Takayoshi Yokoyama, Utsunomiya, JP;
Arata Sato, Utsunomiya, JP;
Canon Kabushiki Kaisha, Tokyo, JP;
Abstract
The optical system capable of performing zooming includes a first lens unit and a second lens unit and satisfies conditions of |(ΔTMyu+ΔTMyl)/(ΔWMyu+ΔWMyl)|<0.67 and 0.75<|(ΔWMyu+ΔWMyl)|/2P<16.0. ΔWMyu represents a lateral aberration amount for a d-line of a 70 percent upper ray reaching an 80 percent image height at a wide-angle side middle focal length, ΔWMyl represents a lateral aberration amount for the d-line of a 70 percent lower ray reaching the 80 percent image height at the wide-angle side middle focal length, ΔTMyu represents a lateral aberration amount for the d-line of the 70 percent upper ray reaching the 80 percent image height at a telephoto side middle focal length, ΔTMyl represents a lateral aberration amount for the d-line of the 70 percent lower ray reaching the 80 percent image height at the telephoto side middle focal length, and P represents a pixel pitch of the image sensor.