Patent · US Active

Lead and arsenic free optical glass with high refractive index

US7670973B2 · kind B2 · utility

6Cited by

3References

12Claims

0Family size

Assignee

Schott AG · DE

Inventors

Simone Monika Ritter · Mainz, DE
Ute Woelfel · Bingen, DE
Bianca Schreder · Pocking, DE
Stefanie Hansen · Gensingen, DE

Key dates

Filing date	Oct 25, 2006
Grant date	Mar 2, 2010
Priority date	—
Expiry date	May 1, 2028

Classification

Technology area (CPC C)Chemistry; Metallurgy
CPC primaryC03C3/068
WIPO fieldMaterials, metallurgy
WIPO sectorChemistry

Abstract

Lead and arsenic free, and preferably gadolinium and further preferably also fluorine free, optical glasses for the application fields mapping, projection, telecommunication, optical communication engineering, mobile drive, laser technology and/or micro lens arrays have a refractive index of 1.91≦nd≦2.05, an Abbe number of 19≦νd≦25 and have a low transformation temperature, namely of less than or equal to 470° C. and preferably of less than or equal to 450° C., as well as good producability and processability and crystallization stability.

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