Non-iridescent glass structures

  • US 4,440,822 A
  • Filed: 05/07/1981
  • Issued: 04/03/1984
  • Est. Priority Date: 04/04/1977
  • Status: Expired due to Term
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First Claim
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1. A transparent glass product substantially free of iridescent appearance, having a glass substrate bearing a coating which is substantially uniform across the surface area thereof, said coating consisting of(a) a lower coating zone comprising a material formed of at least two components which is characterized by a gradual change from a first composition proximate to said substrate having a relatively large proportion of a second component;

  • and(b) an upper coating zone having a refractive index substantially the same as that of said second component;

    wherein said lower coating zone is substantially linear with respect to its molecular proporation of said first component, as a function of distance from the glass substrate;

    wherein said first component is SiO2, said second component is SnO2, and said upper coating zone is fluorine-doped tin oxide and wherein said material forming said lower coating zone contains tin oxide in a quantity below 40 percent at the interface of said lower coating zone which is closest to said glass substrate.

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