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Scrolling primary color changer

  • US 5,126,886 A
  • Filed: 04/10/1989
  • Issued: 06/30/1992
  • Est. Priority Date: 04/10/1989
  • Status: Expired due to Term
First Claim
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1. Light filter means for selectively varying the color of light passing in a beam along an optical axis, comprising:

  • three hue component saturation filter means including respective elongated flexible substrate means each having a surface which has a gradient axis and which includesa saturate end portion fixing a respective concentration region adjacent one end of said gradient axis;

    a transparent end portion excluding said filtering material in a region adjacent the opposite end of said gradient axis; and

    a graded portion formed between said end portions having said hue filtering material in a uniform concentration distribution such that said filtering material has a graded density in areas around successive points along said gradient axis in said graded average portion; and

    wherein said three substrate means are movable along their respective gradient axes to position selected average density filtering material areas to be serially intersected by a beam of light from which said component filters proportionally subtract respective complementary hues of light.

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