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. 16, 2017
Filed:
Sep. 29, 2015
Applicant:
Hoya Corporation, Tokyo, JP;
Inventor:
Tomoaki Negishi, Hino, JP;
Assignee:
HOYA CORPORATION, Tokyo, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C03C 3/068 (2006.01);
U.S. Cl.
CPC ...
C03C 3/068 (2013.01);
Abstract
Provided is a glass which contains, by mass %, the following components: 20 to 35% of SiOand BOin total, 50 to 70% of LaO, GdO, YOand YbOin total, 37 to 69% of LaO, 0 to 3% of GdO, 3 to 30% of YO, 0% or more but less than 2% of YbO, 2 to 15% of ZrO, 1 to 6% of TiO, NbOand TaOin total, 0 to 4% of ZnO, and 0 to 2% of WO, wherein a mass ratio ZnO/NbOis in a range of 0 to 1.0 but NbOis contained as an essential component, a refractive index nd is in a range of 1.790 to 1.830, and an Abbe's number vd is in a range of 45 to 48.