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Broadband wire grid polarizer for the visible spectrum

DC
  • US 6,122,103 A
  • Filed: 06/22/1999
  • Issued: 09/19/2000
  • Est. Priority Date: 06/22/1999
  • Status: Expired due to Term
First Claim
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1. A broadband wire grid polarizer for the visible spectrum, the polarizer comprising:

  • a substrate having a first surface and a refractive index;

    a region on the first surface of the substrate having a refractive index which is less than the refractive index of the substrate; and

    an array of parallel, elongated elements disposed on the region; and

    wherein the array has a configuration and the elements have a size which would normally create a resonance effect in combination with the substrate within the visible spectrum; and

    wherein the region with a lower refractive index than the substrate refractive index causes a shift of the normally occurring resonance effect to a lower wavelength, thereby broadening a band of visible wavelengths in which no resonance effect occurs.

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