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:
May. 17, 2011
Filed:
Oct. 05, 2007
Applicant:
Yoshinori Yamamoto, Saitama, JP;
Inventor:
Yoshinori Yamamoto, Saitama, JP;
Assignee:
Sumita Optical Glass, Inc., Saitama, JP;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
C03C 3/253 (2006.01); C03C 3/14 (2006.01); C03C 3/15 (2006.01); C03C 3/155 (2006.01); C03C 3/068 (2006.01);
U.S. Cl.
CPC ...
Abstract
An optical glass for precision molding having a high refractive index (nd) and a low yield temperature (At). The optical glass comprises, as glass components in wt %, 64 to 83% of BiO; 4 to 17% of BO; 0 to 12% of GeO(wherein the total of BOand GeOis 10 to 20%); 0 to 7% of LaO; 0 to 7% of GdO(wherein the total of LaOand GdOis 1 to 13%); 0 to 4% of ZrO; 0 to 5% of TaO; 0 to 15% of ZnO; 0 to 2% of SbO; and 0 to 1% of InO. The optical glass has optical constants, that is, a refractive index (nd) of 2.05 to 2.25 and an Abbe number (vd) of 15 to 22, and a yield temperature (At) of 510° C. or less.