Ultraviolet ray absorbent glass and method for preparing the same
First Claim
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1. An ultraviolet ray absorbent glass which comprises:
- a substrate glass,an ultraviolet ray absorbent film having a thickness of 100-800 nm comprising at least two members selected from the group consisting of zinc oxide, titanium oxide and cerium oxide, anda transparent metal oxide intermediate film comprising at least two components selected from the group consisting of silicon oxide, germanium oxide, aluminum oxide, zirconium oxide, titanium oxide, tin oxide, indium oxide, tantalum oxide, zinc oxide and cerium oxide, provided that at least one component is selected from the group consisting of zing oxide, titanium oxide and cerium oxide, having refractive index which is between the refractive indices of the ultraviolet ray absorbent film and the substrate glass, the intermediate film having an optical film thickness of λ
/4±
10% as large as the wavelength of visible light of 400-700 nm, said intermediate film being located between the ultraviolet ray absorbent film and the substrate glass, whereby iridescence by the ultraviolet ray absorbent film is reduced, and a heat reflecting function is imparted.
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Abstract
A ultraviolet ray absorbent glass comprises a substrate glass, a ultraviolet ray absorbent film including as the major component at least one selected from the group consisting of zinc oxide, titanium oxide and cerium oxide, and an intermediate film having an intermediate refractive index which is between the refractive indices of the ultraviolet absorbent film and the substrate glass, the intermediate film being located between the ultraviolet absorbent film and the substrate glass, whereby iridescence by the ultraviolet ray absorbent film is reduced, and a heat reflecting function is imparted.
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9 Claims
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1. An ultraviolet ray absorbent glass which comprises:
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a substrate glass, an ultraviolet ray absorbent film having a thickness of 100-800 nm comprising at least two members selected from the group consisting of zinc oxide, titanium oxide and cerium oxide, and a transparent metal oxide intermediate film comprising at least two components selected from the group consisting of silicon oxide, germanium oxide, aluminum oxide, zirconium oxide, titanium oxide, tin oxide, indium oxide, tantalum oxide, zinc oxide and cerium oxide, provided that at least one component is selected from the group consisting of zing oxide, titanium oxide and cerium oxide, having refractive index which is between the refractive indices of the ultraviolet ray absorbent film and the substrate glass, the intermediate film having an optical film thickness of λ
/4±
10% as large as the wavelength of visible light of 400-700 nm, said intermediate film being located between the ultraviolet ray absorbent film and the substrate glass, whereby iridescence by the ultraviolet ray absorbent film is reduced, and a heat reflecting function is imparted. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
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Specification