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. 28, 2017
Filed:
Apr. 21, 2015
Cdgm Glass Co., Ltd, Chengdu, Sichuan, CN;
Bo Kuang, Chengdu, CN;
CDGM GLASS CO., LTD, Sichuan, CN;
Abstract
An optical glass has refractive index nd greater than 1.59, Abbe number υd greater than 67, low photoelastic coefficient, good chemical stability and excellent grinding property. Fluorophosphate optical glass contains, by cation percentage contents, 30-40% of P, 12-20% of Al, 30-40% of Ba, 1.3-12% of Ca, 1-10% of Sr, 0-5% of La, 0-6% of Gd, 0-10% of Y, and contains, by anion percentage contents, 25-40% of Fand 60-75% of O. The optical glass is applicable to the manufacturing methods such as high precision molding, secondary hot molding and cold working, in order to produce optical elements like high-performance sphere, aspheric surface, plane lens, prism and raster.