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:
Apr. 02, 2019
Filed:
Apr. 16, 2018
Applicant:
Nikon Corporation, Tokyo, JP;
Inventors:
Assignee:
NIKON CORPORATION, Tokyo, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C03C 3/068 (2006.01); G02B 1/00 (2006.01); G02B 21/06 (2006.01); G02B 21/16 (2006.01); G03B 17/14 (2006.01); G03B 42/00 (2006.01);
U.S. Cl.
CPC ...
C03C 3/068 (2013.01); G02B 1/00 (2013.01); G02B 21/06 (2013.01); G02B 21/16 (2013.01); G03B 17/14 (2013.01); G03B 42/00 (2013.01);
Abstract
To provide an optical glass which has a unique combination of anomalous dispersibility in a visible range with that in a near-infrared range. Provided is an optical glass containing respective components of SiOfrom 14 to 26% by mass, BOfrom 9 to 16% by mass, and LaOfrom 10 to 42% by mass as essential components, and containing respective components of ZnO, YO, ZrO, TaO, LiO, and NaO as optional components, and satisfying respective relationships of SiO+BOfrom 28 to 36% by mass, ZrO+TaOfrom 6 to 16% by mass, LaO+YO+ZnO from 43 to 59% by mass, and LiO+NaO from 2 to 14% by mass.