Patent · US Expired

Preferably Pb-free and As-free optical glasses with Tg≦500° C.

US6960545B2 · kind B2 · utility

6Cited by

9References

8Claims

0Family size

Assignee

Schott Glas · DE

Inventors

Silke Wolff · Hückeswagen, DE
Ute Woelfel · Bingen, DE

Key dates

Filing date	Dec 2, 2003
Grant date	Nov 1, 2005
Priority date	—
Expiry date	Dec 2, 2023

Classification

Technology area (CPC Y)Emerging Cross-Sectional Technologies
CPC primaryY10S501/903
WIPO fieldMaterials, metallurgy
WIPO sectorChemistry

Abstract

The present invention relates to preferably lead-free and arsenic-free optical glasses, having a refractive index of 1.48≦nd≦1.56, an Abbe number of 64≦νd≦72, a low transformation temperature (Tg≦500° C.) and good ion exchange properties, as well as good chemical resistance and crystallization stability, and comprising the following composition (in % by weight):The glass may additionally contain standard refining agents. The invention also relates to the use of the optical glasses according to the invention in the application areas of imaging, projection, telecommunications, optical communication technology and/or laser technology.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.