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:
Jul. 31, 2007
Filed:
Sep. 03, 2003
Teruhide Inoue, Osaka, JP;
Kunihiro Nomiyama, Osaka, JP;
Yoshikazu Toshikiyo, Osaka, JP;
Yukihito Nagashima, Osaka, JP;
Teruhide Inoue, Osaka, JP;
Kunihiro Nomiyama, Osaka, JP;
Yoshikazu Toshikiyo, Osaka, JP;
Yukihito Nagashima, Osaka, JP;
Nippon Sheet Glass Company, Limited, Tokyo, JP;
Abstract
It is an object of the present invention to provide a clad glass composition for graded-index rod lens for covering, during manufacturing, a preform glass composition lens of a graded-index rod lens that does not include PbO, in which the composition substantially does not include PbO, and expressed in mol % includes SiO: 45 to 65, NaO: 3 to 30, KO: 0 to 10, MgO: 0 to 15, BaO: 0 to 20, where NaO+KO: 3 to 35 and MgO+BaO: 0 to 25, and furthermore includes BO: 0 to 15, ZnO: 0 to 10, TiO: 0 to 10, YO: 0 to 7, ZrO: 0 to 7, NbO: 0 to 7, InO: 0 to 7, LaO: 0 to 7, TaO: 0 to 10, where BO+ZnO+TiO+YO+ZrO+NbO+InO+Lato 20, and a content of at least one of TiOand LaOis substantially 0 mol %.