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:
May. 09, 2017
Filed:
Feb. 23, 2016
Applicant:
Tamron Co., Ltd., Saitama-shi, JP;
Inventors:
Hisayuki Yamanaka, Saitama, JP;
Keisuke Okada, Saitama, JP;
Takahiko Sakai, Saitama, JP;
Yoshito Iwasawa, Saitama, JP;
Assignee:
Tamron Co., Ltd., Saitama-Shi, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G02B 9/12 (2006.01); G02B 13/04 (2006.01); G02B 9/64 (2006.01); G02B 13/00 (2006.01); G02B 27/64 (2006.01); G02B 27/00 (2006.01);
U.S. Cl.
CPC ...
G02B 9/64 (2013.01); G02B 13/005 (2013.01); G02B 27/646 (2013.01); G02B 13/006 (2013.01); G02B 27/0025 (2013.01);
Abstract
An optical system of the present invention includes, in order from an object side: a first lens group G; a second lens group Ghaving positive refractive power; and a third lens group Ghaving positive refractive power, wherein the first lens group Gand the third lens group Gare fixed in an optical axis direction while the second lens group Gis moved in an optical axis direction to focus on from an object at infinity to an object at a finite distance, and specified conditions is satisfied.