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:
Nov. 08, 2011
Filed:
Apr. 02, 2008
Jie Fu, Kanagawa, JP;
Jie Fu, Kanagawa, JP;
Ohara Inc., Kanagawa, JP;
Abstract
A glass composition being suitable for precision mold press forming, having superior resistance to devitrification, having optical constants (a refractive index, an Abbe number, and the like) required for aspherical lenses, and a low glass transition temperature. There is provided an optical glass comprising no less than 5 mol % and no more than 60 mol % of a BOcomponent, and no less than 0.2 mol % and no more than 60 mol % of a TeOcomponent, by mol % on the basis of oxides. Further, there is provided an optical glass mentioned above having optical constants with a refractive index (n) of 1.80 to 2.20, and an Abbe number (ν) of 16 to 40. Still further, there is provided an optical glass mentioned above having a glass transition temperature (Tg) of no more than 680° C.