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:
Mar. 02, 2010
Filed:
Jul. 28, 2006
Yoshiko Kasuga, Tokyo, JP;
Mikio Ikenishi, Tokyo, JP;
Xuelu Zou, Tokyo, JP;
Hoya Corporation, Tokyo, JP;
Abstract
The optical glass has a refractive index of equal to or greater than 1.65 and an Abbé number ranging from 50 to 60. In the optical glass, as molar basis, a ratio of SiOcontent to BOcontent is greater than 0.5 and equal to or less than 0.90; a total content of SiOand BOranges from 50 to 70 percent; LiO content ranges from 5 to 20 percent; LaOcontent ranges from 0.5 to 22 percent; a ratio of ZnO content to RO (MgO, CaO, SrO and BaO) is equal to or greater than 0.5; a total content of GdO, YOand YbOranges from 1 to 15 percent; SbOcontent ranges from 0 to 1 percent; and no BaO is comprised, or a ratio of the total content of LaO, GdO, YOand YbOto the content of BaO is equal to or greater than 10.