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:
Dec. 30, 2014
Filed:
Jul. 22, 2013
Applicant:
Asahi Glass Company, Limited, Chiyoda-ku, JP;
Inventor:
Noriyoshi Kayaba, Tokyo, JP;
Assignee:
Asahi Glass Company, Limited, Chiyoda-ku, JP;
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
C03C 3/068 (2006.01);
U.S. Cl.
CPC ...
C03C 3/068 (2013.01);
Abstract
The present invention relates to an optical glass including, in terms of mass % on the basis of oxides, BO: 10% to 20%, SiO: 0.5% to 12%, ZnO: 5% to 19%, TaO: 3% to 17%, LiO: 0.2% to 3%, ZrO: 0.6% to 4.9%, WO: 6.1% to 20%, LaO: 32.5% to 50%, and YO: 0.2% or more and less than 1.5%, in which a mass fraction (LaO/YO) of a content of LaOto a content of YOin terms of mass % is 40 or higher, and the optical glass has optical constants of a refractive index nof 1.83 to 1.88 and an Abbe's number υof 39 to 42.