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:
Aug. 22, 2014
Applicant:
Hoya Corporation, Tokyo, JP;
Inventor:
Tomoaki Negishi, Akishima, JP;
Assignee:
HOYA CORPORATION, Tokyo, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C03C 3/068 (2006.01); G02B 1/00 (2006.01); G02B 27/00 (2006.01);
U.S. Cl.
CPC ...
C03C 3/068 (2013.01); G02B 1/00 (2013.01); G02B 27/0025 (2013.01);
Abstract
An optical glass that is oxide glass, containing Si, B, La, Ti, Nb, and Zr; containing, denoted as cation %, Siand Bof 5 to 55% in total, Laof 10 to 50%, with a total content of La, Gd, Yand Yb≦70%, and Ti, Nb, Taand Wof 22 to 55% in total, with a content of Ti≦22%, wherein [Si/(Si+B)]≦0.40; the total content of La, Gd, Y, Yb, Zr, Ti, Nb, Ta, Wand Bi≧65%; [Y/(La+Gd+Y+Yb)]≦0.12; [Ba/(La+Gd+Y+Yb)]≦0.40; [(Zr+Ti+Nb+Ta+W)/Zr]≧2; (Ti/B)≧0.85; and an Abbé number νd is in a range from 23 to 35, and a refractive index nd satisfies nd≧2.205−(0.0062×νd).