Non-iridescent glass structures
OwnerRoy G. Gordoninventor
Life of this patent
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Abstract
This disclosure describes transparent glass window structures of the type bearing a coating of infra-red reflective material which is advantageously less than about 0.85 microns in thickness and wherein the observance of iridescence resulting from such a reflective coating is markedly reduced by provision of a very thin coating system beneath said infra-red reflective coating. The thin coating system forms means to reflect and refract light to interfere with the observation of iridescence. A particular advantage of the invention is the ability of the thin coating system to be coated in a fraction of time presently required to coat anti-iridescent interlayers of the prior art.
Claims12
A process for making a non-iridescent, transparent, structure of the type comprising
- (A) a transparent substrate,
- (B) an infra-red reflective coating thereon and
- (C) an iridescence-suppressing interlayer between said substrate and infra-red-reflective coating, said process comprising the steps of forming, between said infra-red-reflective coating and said transparent substrate, an interlayer formed of two coatings
- (1) a coating nearer to said substrate a first interlayer component of relatively high refractive index material;
- (2) a coating over said relatively high refractive index material, a second interlayer component of relatively low refractive index material, and
- (3) terminating each interlayer component at such a thickness that the combined interlayer components form said iridescence-suppressing means and the total optical thickness of said interlayer components is about 1/6th of a 500 nanometer design wavelength.
A process for making a non-iridescent, transparent, structure of the type comprising
- (A) a transparent substrate,
- (B) an electrically conductive coating thereon and
- (C) an iridescence-suppressing interlayer between said substrate and said conductive coating, said process comprising the steps of forming, between said conductive coating and said transparent substrate, an interlayer by
- (1) coating nearer to said substrate a first interlayer component of relatively high refractive index material;
- (2) coating over said relatively high refractive index material, a second interlayer component of relatively low refractive index material, and
- (3) terminating each interlayer component at such a thickness that the combined interlayer components for said iridescence-suppressing means and with the total optical thickness of said interlayer components are about 1/6th of a 500 nanometer design wavelength.
Dependencies are inferred from the claim text.