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Ultraviolet transmitting multi-layer polarizer

  • US 5,359,498 A
  • Filed: 10/21/1992
  • Issued: 10/25/1994
  • Est. Priority Date: 10/21/1992
  • Status: Expired due to Term
First Claim
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1. A multi-layer polarized diffuser with improved ultraviolet light transmission, the improvement comprising:

  • a thin multi-layered polarizer being disposed between a source of visible and ultraviolet light; and

    an area to be illuminated;

    wherein the thin multi-layered polarizer is capable of transmitting wavelengths of polarized light of wavelengths between about 290 nanometers and about 800 nanometers;

    wherein the multi-layered polarizer comprises a light transmitting support layer and a light polarizing layer;

    wherein the light transmitting support layer is composed of material capable of transmitting light of wavelengths between about 290 and about 800 nanometers;

    wherein the light transmitting support layer comprises a light diffuser for directed scattering of incident light emanating from a source of visible and ultraviolet light;

    wherein the light polarizing layer comprises a thin sheet of light transmissible material, the thin sheet being capable of transmitting and polarizing light of wavelengths between about 290 and about 800 nanometers andwherein further the support layer comprises a flat light diffuser, the support layer comprising a first substantially flat and smooth surface and a second substantially textured surface and at least one edge, the at least one edge being disposed at the perimeter of the flat light diffuser; and

    further whereinthe second substantially textured surface of the flat light diffuser faces toward, a source of visible and ultraviolet light, the textured surface being for refracting incident light emanating from a source of visible and ultraviolet light and further for providing a directed scattering of the incident light, the directed scattering comprising diffusion of the incident light; and

    further whereinthe first substantially flat and smooth surface of the flat light diffuser faces toward the area to be illuminated by a source of visible and ultraviolet light.

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