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. 10, 2015
Filed:
Dec. 17, 2012
Applicant:
Tamron Co., Ltd., Saitama-shi, Saitama, JP;
Inventor:
Shingo Fuse, Kashiwa, JP;
Assignee:
TAMRON CO., LTD., Saitama-shi, JP;
Primary Examiner:
Int. Cl.
CPC ...
G02B 13/14 (2006.01); G02B 13/18 (2006.01); G02B 13/00 (2006.01); G02B 9/10 (2006.01); G02B 9/06 (2006.01);
U.S. Cl.
CPC ...
G02B 13/14 (2013.01); G02B 9/10 (2013.01); G02B 13/003 (2013.01); G02B 9/06 (2013.01);
Abstract
The invention provides an infrared fixed-focus lens of which component lens pieces are made of germanium characterized by low chromatic dispersion, and have no surface processed to serve as diffraction optics. The infrared fixed-focus lens comprises a first lens piece disposed closer to an object and of negative power, and a second lens piece disposed closer to the image plane and of positive power. Both the first and second lens pieces are made of germanium.