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:
Feb. 05, 2013
Filed:
Jul. 15, 2009
BO Kuang, Sichuan, CN;
Wei Wen, Sichuan, CN;
Weimin LI, Sichuan, CN;
CDGM Glass Co., Ltd., Chengdu, CN;
Abstract
The invention provides an environment-friendly optical glass with high refractive index, low dispersion and high light transmittance. The optical glass includes 6%-17% of BO, 2-10% of SiO, more than 25% but less than 45% of LaO, 5-25% of GdO, 0-3% of NbO, more than 19% but less than 27% of TaO, 0-16% of ZnO, 0-5% of BaO, 0-5% of CaO, 0-5% of SrO, 0-9% of ZrO, 0-8% of YO, 0-8% of YbO, 0-5% of WO, 0-2% of LiO, NaO and KO, equal to 0.01% but less than 0.1% of SbOand 0-1% of SnOoptical glass. The environment-friendly optical glass does not contain GeO, and has refractive index of 1.85-1.90, Abbe number of 35-45, the corresponding wavelength below 440 nm when transmittance thereof reaches 80% and high transmittance.