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Night vision compatible and sunlight readable, lighted, word indicating pushbutton switch and indicator

  • US 4,722,028 A
  • Filed: 06/10/1986
  • Issued: 01/26/1988
  • Est. Priority Date: 06/10/1986
  • Status: Expired due to Term
First Claim
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1. An apparatus for selectively illuminating a display for compatible unassisted night vision illumination and illumination for a night vision imaging system, comprising:

  • a light box;

    a plurality of three-dimensional filter elements disposed in said light box, said light box disposed behind said display, at least one of said three-dimensional filter elements having a predetermined spectral transmissivity compatible with said night vision imaging system;

    wherein at least one other one of said plurality of three-dimensional filter elements has a spectral transmissivity in a wavelength range compatible with uansssisted night vision, andmeans for selectively illuminating said plurality of said three-dimensional filter elements, including selectively illuminating all of said plurality of filter elements for daytime vision,whereby said apparatus illuminates said display in compatible manner with night vision imaging systems unassisted night vision and daytime vision.

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