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:
Mar. 26, 2013
Filed:
Feb. 24, 2010
Silke Wolff, Hueckeswagen, DE;
Karl Mennemann, Taunusstein, DE;
Uwe Kolberg, Mainz, DE;
Ute Woelfel, Mainz-Laubenheim, DE;
Thomas Lifka, Mainz-Bretzenheim, DE;
Silke Wolff, Hueckeswagen, DE;
Karl Mennemann, Taunusstein, DE;
Uwe Kolberg, Mainz, DE;
Ute Woelfel, Mainz-Laubenheim, DE;
Thomas Lifka, Mainz-Bretzenheim, DE;
Schott AG, Mainz, DE;
Abstract
The lead-free and arsenic-free optical glasses have a refractive index of 1.83≦n≦1.95 and an Abbé number of 24≦ν≦35, good chemical resistance, excellent crystallization stability and a composition, in wt. % based on oxide content, of SiO, 2-8; BO, 15-22; LaO, 35-42; ZnO, 10-18; TiO, 9-15; ZrO, 3-10; NbO, 4-10; and WO, >0.5-3. Besides containing at most 5 wt. % of each of GeO, AgO and BaO and conventional fining agents, they may also contain at most in total 5 wt. % of AlO, MgO, CaO, SrO, POand up to at most in total 5 wt. % of the components F, TaO. The glasses are preferably free of alkali metal oxides, BiO, YO, GdOand/or YbO. Optical elements made from the optical glass are also described.