Radiation modulating apparatus and method

  • US 4,618,218 A
  • Filed: 04/19/1984
  • Issued: 10/21/1986
  • Est. Priority Date: 04/19/1984
  • Status: Expired due to Term
First Claim
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1. An apparatus to selectively modify emission or absorption of radiation within a predetermined wavelength range and also modify reflection of radiation within said predetermined wavelength range, said apparatus having a radiation emitting or receiving axis along which said apparatus is adapted to be oriented so that the axis is generally parallel to a major path component of the radiation, said apparatus having a front side and a rear side relative to said axis, with the front side adapted to be positioned to emit or initially receive the radiation, said apparatus comprising:

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