Patent · US Active

Optical glasses of the dense barium flint position

US7977264B2 · kind B2 · utility

4Cited by

6References

20Claims

0Family size

Assignee

Schott AG · DE

Inventors

Silke Wolff · Hückeswagen, DE
Ute Woelfel · Bingen, DE
Gordon Kissl · Heidesheim, DE

Key dates

Filing date	May 29, 2008
Grant date	Jul 12, 2011
Priority date	—
Expiry date	May 19, 2029

Classification

Technology area (CPC C)Chemistry; Metallurgy
CPC primaryC03C3/097
WIPO fieldMaterials, metallurgy
WIPO sectorChemistry

Abstract

The optical glasses designated to be used in the areas of imaging, sensors, microscopy, medical technology, digital projection, photolithography, laser technology, wafer/chip technology as well as telecommunications, optical communications engineering and optics/illumination in the automotive sector with a refractive index nd of 1.60≦nd≦1.72 and/or an Abbe number vd of 32≦vd≦45 and with a Tg of 567° C. to 640° C., pronounced short flint character, good chemical resistance, excellent resistance to crystallization, good solarization stability and the following composition (in % by weight based on oxides):

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