Patent ID: 11958770
Assignee: SCHOTT AG
Field: Materials, metallurgy (Chemistry)
Classification: CPC C | IPC C

Claim 19:
20. A glass article, comprising:
a glass having a refractive index nd of at least 2.02 and being in the form of at least one of:
a glass for eyeglasses;
a stack of wafers;
a wafer;
a wafer with a maximum diameter of 5.0 cm to 40.0 cm;
a lens;
a spherical lens;
a prism;
an asphere;
a light wave guide;
a fiber; or
a plate;
wherein the glass has an internal transmission TI of at least 85%, measured at a wavelength of 460 nm and a sample thickness of 10 mm, and wherein the glass comprises the following components in % by weight:, Proportion 

Component
(% by weight)

SiO2
 2-10

B2O3
 2-10

La2O3
40-55

Gd2O3
 4-11

Nb2O5
 6-14

TiO2
  8-18.5

ZrO2
 5-11;

wherein a sum of the proportions of La2O3, Nb2O5, TiO2 and ZrO2 is at least 76.5% by weight, and a weight ratio of a sum of the proportions of La2O3, Nb2O5 and ZrO2 to the proportion of TiO2 is at least 3.85:1.