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:
Jul. 09, 2019
Filed:
Aug. 14, 2017
Cdgm Glass Co., Ltd, Sichuan, CN;
Bo Kuang, Chengdu, CN;
CDGM GLASS CO., LTD, Sichuan, CN;
Abstract
The invention provides a high-refraction low-dispersion optical glass with low material cost, refractive index of 1.77-1.85, and Abbe number of 40-48, wherein the following components by weight percentage: 4-20% of SiO, 8-24% of BO, 20-40% of LaO, 11-30% of GdO, 0-15% of YO, 0-8% of TiO, 0-8% of TaO, more than 0 but less than or equal to 8% of NbO, less than 1 of TaO/NbO, more than 0 but less than or equal to 15% of ZrO, and 11-30% of ZnO. The invention reduces the content of TaOand optimizes the cost of raw materials; through rational composition design, the optical glass of the invention is conducive to precision molding while achieving the required optical constant, with excellent chemical stability. A glass preform and an optical element made of the optical glass are also disclosed.