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:
Oct. 07, 2014
Filed:
Oct. 12, 2012
Hoya Corporation, Tokyo, JP;
Kosuke Yamaguchi, Shinjuku-ku, JP;
Naomi Matsumoto, Shinjuku-ku, JP;
Hoya Corporation, Tokyo, JP;
Abstract
An aspect of the present invention relates to an optical glass, which comprises, denoted as weight percent, 2 to 37 percent of SiO, 0 to 25 percent of BO, 0 to 10 percent of GeO, 18 to 55 percent of a combined content of LiO, NaO, KO, CaO, SrO, and BaO, and 27 to 55 percent of a combined content of TiO, NbO, and WO, wherein the weight ratio of SiOcontent relative to a combined content of SiOand BOranges from 0.1 to 1, a weight ratio of the LiO content to a combined content of LiO, NaO, KO, CaO, SrO, and BaO ranges from 0 to 0.4, and a weight ratio of TiOcontent relative to a combined content of TiO, NbO, and WOranges from 0.35 to 1, with a refractive index nd of 1.860 to 1.990 and an Abbé number νd of 21 to 29.