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Interleaving of similar thin-film stacks for producing optical interference coatings

  • US 5,179,468 A
  • Filed: 11/05/1991
  • Issued: 01/12/1993
  • Est. Priority Date: 11/05/1991
  • Status: Expired due to Term
First Claim
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1. An optical interference coating for reflecting infrared radiation and transmitting visible light comprising:

  • one or more interleaved stacks said interleaved stacks comprising a first stack containing three alternating layers of high and low refractive index materials of form (L/a bH L/a), and a second stack containing three alternating layers of high and low refractive index materials of the form (H/a bL H/a)wherein a and b are predetermined values, and a≧

    1.75;

    and wherein L and H are a low and a high index of refraction material respectively, L and H each being defined as having an optical thickness of a multiple of a quarter-wave of the stack wavelength.

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