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FOUR LAYER ANTI-REFLECTION COATING

  • US 3,781,090 A
  • Filed: 11/06/1972
  • Issued: 12/25/1973
  • Est. Priority Date: 11/06/1972
  • Status: Expired due to Term
First Claim
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2. A multi-layered anti-reflection coating as in claim 1 wherein the substrate has an index of refraction of Ns and the indices of refraction are related as follows, N1 equals N4 and N2 is greater than N3 and Ns.

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