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. 01, 2011
Filed:
Apr. 21, 2008
Minoru Onoda, Osaka, JP;
Kazuhiko Ishimaru, Osaka, JP;
Shoji Nakamura, Osaka, JP;
Panasonic Corproation, Osaka, JP;
Abstract
An optical glass composition contains, in % by weight, 1.0% or more and 12.0% or less of SiO, 8.0% or more and 18.0% or less of BO, 0% or more and 6.0% or less of ZnO, 1.0% or more and 10.0% or less of ZrO, 25.0% or more and 47.0% or less of LaO, 0% or more and 5.0% or less of RO (here, R is at least one of Li, Na and K), 0% or more and 15.0% or less of NbO, 0% or more and 7.0% or less of TiO, 0% or more and 15.0% or less of TaO, 1.0% or more of NbO+TiO+TaO, 0% or more and 25.5% or less of GdO, 0.5% or more and 15.0% or less of WOand 0.5% or more and 26.0% or less of GdO+WO, and has nd of 1.88 or higher and 1.92 or lower and νd of 33 or higher and 37 or lower, and a preform and an optical element are formed from the optical glass composition.