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:
May. 01, 2008
Applicants:
Minoru Onoda, Osaka, JP;
Kazuhiko Ishimaru, Osaka, JP;
Shoji Nakamura, Osaka, JP;
Inventors:
Assignee:
Panasonic Corporation, Osaka, JP;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
C03C 3/068 (2006.01); C03C 3/064 (2006.01); C03C 3/066 (2006.01); C03C 3/062 (2006.01);
U.S. Cl.
CPC ...
Abstract
An optical glass composition contains, in % by mole, 14.0% or more and 31.0% or less of SiO, 19.0% or more and 40.0% or less of BO, 0% or more and 5.0% or less of LiO, 0% or more and 12.0% or less of ZnO, 0% or more and 12.0% or less of ZrO, 15.0% or more and 26.0% or less of LaO, 22.0% or more and 38.0% or less of LaO+ZrO, 2.0% or more and 5.0% or less of TaOand 4.0% or more and 16.0% or less of GdO, and has nd of 1.83 or higher and 1.87 or lower and νd of 43 or higher and 47 or lower, and a preform and an optical element are formed from the optical glass composition.