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:
Jul. 03, 2018
Filed:
Aug. 16, 2016
Applicants:
Optical Logic Inc., Nagano, JP;
Kantatsu Co., Ltd., Tochigi, JP;
Inventors:
Yoji Kubota, Nagano, JP;
Kenichi Kubota, Nagano, JP;
Hitoshi Hirano, Nagano, JP;
Hisao Fukaya, Tochigi, JP;
Assignees:
OPTICAL LOGIC INC., Nagano, JP;
KANTATSU CO., LTD., Tochigi, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G02B 3/02 (2006.01); G02B 15/14 (2006.01); G02B 13/00 (2006.01); G02B 5/00 (2006.01); G02B 9/62 (2006.01); G02B 27/00 (2006.01);
U.S. Cl.
CPC ...
G02B 13/0045 (2013.01); G02B 5/005 (2013.01); G02B 9/62 (2013.01); G02B 27/0025 (2013.01);
Abstract
An imaging lens includes a first lens group and a second lens group, arranged in this order from an object side to an image plane side. The first lens group includes a first lens having positive refractive power, a second lens having positive refractive power, and a third lens. The second lens group includes a fourth lens, a fifth lens having negative refractive power, and a sixth lens. The sixth lens has a concave surface facing the object side near an optical axis thereof.