Non-iridescent glass structures

  • US 4,419,386 A
  • Filed: 08/30/1982
  • Issued: 12/06/1983
  • Est. Priority Date: 09/14/1981
  • Status: Expired due to Term
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First Claim
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1. 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.

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