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:
Nov. 19, 2013
Filed:
Oct. 06, 2011
Applicants:
Nobuyuki Adachi, Saitama, JP;
Yasuhiko Obikane, Saitama, JP;
Takahiko Sakai, Saitama, JP;
Inventors:
Assignee:
Tamron Co., Ltd., Saitama-shi, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G02B 9/14 (2006.01); G02B 3/02 (2006.01);
U.S. Cl.
CPC ...
Abstract
A fixed focus lens comprising, sequentially from an object side, a first lens group having a positive refractive power; a second lens group having a negative refractive power; and a third lens group having a positive refractive power. The first lens group includes an aperture stop. The second lens group is configured by a single lens element. During focusing, the second lens group moves along an optical axis and the first lens group and the third lens group are fixed with respect to an imaging plane.