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:
Jun. 25, 2013
Filed:
Nov. 07, 2011
Applicants:
Kenji Obu, Sagamihara, JP;
Ken Wada, Sakura, JP;
Assignee:
Canon Kabushiki Kaisha, , JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G02B 15/14 (2006.01); G02B 3/12 (2006.01);
U.S. Cl.
CPC ...
Abstract
The optical system of the present invention includes a plurality of lens groups and a variable focus lens. Here, the variable focus lens satisfies the following condition:−0.023≦{(−1)/ν−(−1)/ν}/()≦0.023