Patent · US Active

Lead-free niobium-bismuth-phosphate optical glass with a high index of refraction

US7638448B2 · kind B2 · utility

13Cited by

3References

19Claims

0Family size

Assignee

Schott AG · DE

Inventors

Silke Wolff · Hückeswagen, DE
Simone Monika Ritter · Mainz, DE
Ute Woelfel · Bingen, DE

Key dates

Filing date	Aug 8, 2007
Grant date	Dec 29, 2009
Priority date	—
Expiry date	Feb 21, 2028

Classification

Technology area (CPC C)Chemistry; Metallurgy
CPC primaryC03C3/253
WIPO fieldMaterials, metallurgy
WIPO sectorChemistry

Abstract

The lead-free optical glass can be used in the fields of imaging, sensor technology, microscopy, medical technology, digital projection, photolithography, laser technology, wafer/chip technology, as well as of telecommunications, optical communication engineering and optics/lighting in the automotive sector. It has a refractive index nd of 1.82≦nd≦2.00 and/or an Abbe number vd of 18≦vd≦28 with good chemical stability, excellent crystallization stability and the following composition, in wt. based on oxide content, of:

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