Coated ultraviolet absorbing glass
AssigneeCorning Incorporated
InventorsDavid G. Grossman, Ronald L. Stewart
Life of this patent
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Abstract
This article is a glass substrate having a coating thereon. The coating strongly absorbs certain ultraviolet radiation. The preferred coating absorbs ultraviolet radiation at wavelengths ranging from 230 up to at least 280 nm while providing high transmission throughout a region of visible wavelengths. The preferred coating consisting essentially of three layers, wherein the first layer adjacent the substrate is a mixture of SiO2 and TiO2; the second layer is TiO2 and the third layer farthest from the substrate is SiO2.
Claims17
A glass substrate having a multilayer coating, the coating comprises at least three layers,
- (1) a first layer adjacent to a said substrate consisting essentially of a mixture of SiO2 and TiO2,
- (2) a second layer consisting essentially of TiO2, and
- (3) a third layer, farthest from said substrate, consisting essentially of SiO2,
- wherein the coating absorbs ultraviolet radiation at wavelengths ranging from about 230 nm to about 300 nm, while providing transmission throughout visible wavelengths.
A glass substrate having a multilayer coating thereon wherein the coating absorbs ultraviolet radiation at wavelengths ranging from 250 to 280 nm while providing transmission throughout visible wavelengths, the coating consisting essentially of three layers, wherein the first layer adjacent the substrate is a mixture of SiO2, and TiO2, wherein the glass substrate is capable of absorbing ultraviolet radiation at wavelengths in the 400 nm region, while providing transmission throughout the visible wavelengths, said glass substrate comprising an ultraviolet blocking glass, and a photodarkening resistant glass.
An optical body comprising:
- a) a glass substrate capable of absorbing ultraviolet radiation at wavelengths in the 4-400 nm region, while providing high transmission throughout the visible region into the near infrared region;
- b) said glass having thereon a coating comprised of at least three layers,
- (1) a first layer adjacent to a said glass consisting essentially of a mixture of SiO2 and TiO2,
- (2) a second layer consisting essentially of TiO2, and
- (3) a third layer, farthest from said glass, consisting essentially of SiO2;
- the coating absorbs ultraviolet radiation at wavelengths in the 230-300 nm region while providing high transmission throughout a region of visible wavelengths;
- the coating comprising at least one of the oxides of tantalum, titanium, cerium, niobium, hafnium, or rare earth metals.
Dependencies are inferred from the claim text.