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:
Jan. 29, 2008
Filed:
Feb. 27, 2004
Silke Wolff, Hueckeswagen, DE;
Ute Woelfel, Mainz, DE;
Uwe Kolberg, Mainz, DE;
Holger Kasprzik, Mainz-Budenheim, DE;
Silke Wolff, Hueckeswagen, DE;
Ute Woelfel, Mainz, DE;
Uwe Kolberg, Mainz, DE;
Holger Kasprzik, Mainz-Budenheim, DE;
Schott AG, Mainz, DE;
Abstract
A short optical glass is disclosed which is particularly suited for the applications imaging, projection, telecommunication, optical information technology and/or laser technology, also particularly suited for fiber applications (light guides or imaging guides). Preferably, the glass has a refractive index of 1.54≦n≦1.62 and an Abbe coefficient of 48≦v=57. It further has good attenuating and ion exchange characteristics, good chemical stability and good crystallization stability. The glass comprises 35 to 50 wt.-% SiO, 0.1 to 6 wt.-% BO, 0.1 to 7 wt.-% AlO, 0.1 to 4 wt.-% PO, 4 to 24 wt.-% RO (alkali oxides), 6 to 14.5 wt.-% BaO, 0 to 12 wt.-% other RO (alkaline earth oxides), 14 to 25 wt.-% ZnO, 0 to 5 wt.-% LaO, 0 to 10 wt.-% ZrO, wherein RO is an alkali oxide, RO is an alkaline earth oxide other than BaO, wherein LiO is 6 wt.-% at the most, wherein the glass does not contain any GeO, SnO, SnO, AgO, SbOand, preferably, no rare earth oxides, and wherein the glass may be molten while adding suitable purifying agents.