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Color image intensifier device and method for producing same

  • US 5,233,183 A
  • Filed: 07/26/1991
  • Issued: 08/03/1993
  • Est. Priority Date: 07/26/1991
  • Status: Expired due to Term
First Claim
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1. An image intensifier for producing a colored output image, comprising;

  • (a) an evacuated envelope having an input window for receiving incident light from the environment into said intensifier and a filter optic output window through which an output image is projected from said intensifier;

    (b) input filter means affixed proximate said input window for filtering said incident light, a first portion of said input filter means passing red light, a second portion passing green light and a third portion passing blue light, said first, second and third portions of said input filter means each subdivided into a plurality of input filters interspersed and distributed in a generally planar configuration parallel to said input window;

    (c) output coloring means affixed proximate said output window for coloring said output image, a first portion of said output coloring means providing red light, a second portion providing green light and a third portion providing blue light, said first, second and third portions of said output coloring means each subdivided into a plurality of coloring elements, interspersed and distributed in a generally planar configuration parallel to said output window, said output coloring means and said input filter means being stationary with respect to said intensifier when producing said output image and having a spacial alignment relative to each other, said input filters of said first, second and third portions of said input filter means having an approximate one-to-one correspondence with said coloring elements of said first, second and third portions of said output coloring means, respectively, such that incident light passing through said first, second and third portions of said input filter means generates an output signal from said intensifier which is colorized by said first, second and third portions, respectively, of said output coloring means to represent the coloring of said incident light; and

    (d) a photocathode contained within said envelope for converting said incident light passing through said input window and said input filter means into a photoelectron signal, amplifying means contained within said envelope for amplifying said photoelectron signal into an amplifier signal and reconverting mean contained within said envelope for converting said amplified signal into a visible light output image, said reconverting means being a phosphor layer deposited upon a surface of said output window interior to said envelope, said coloring elements being color absorption/transmission filters of tinted photoresist deposited upon a surface of said output window exterior to said envelope, said phosphor layer emitting several wavelengths of light in the visible region when struck by said amplified signal, said light of several wavelengths approximating white light and propagating through said output window and said output filters, said output image being colorized, said input filters being screen printings upon a glass substrate, said glass substrate sandwiched between and bonded with said input window and said photocathode.

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