Window coating with low haze
OwnerRoy G. Gordoninventor
Life of this patent
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Abstract
A durable energy-conserving window glass is produced with very low scattering of visible light. A typical structure consists of soda-lime glass coated successively with alumina, then fluorine-doped tin oxide and finally with bismuth silicate glass. The whole structure is heated so that the bismuth silicate glass softens and flows to form a smooth surface.
Claims15
In a structure comprising a transparent sheet with a rough transparent coating on at least one surface of said sheet, the improvement wherein:
- said rough coating is itself coated with a transparent glass layer having a refractive index substantially equal to the refractive index of said rough coating, the transparent coating having a smooth outer surface, the structure exhibiting reduced haze, enhanced abrasion resistance in reference to the structure without said glass coating and reduced ultraviolet transmission.
In a method for producing a transparent glass structure, the structure comprising a transparent sheet with a rough transparent coating on at least one surface of the sheet, the structure exhibiting haze when viewed, the improvement which comprises:
- coating a layer of glass on said rough transparent coating, the glass layer having a refractive index substantially equal to the refractive index of said rough coating, the glass layer flowing into and filling the roughened surface and forming a smooth outer surface whereby the haze of said structure is reduced, an enhanced abrasion resistance is imparted to said structure and ultraviolet transmission is reduced.
Dependencies are inferred from the claim text.