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Depth sampling three-dimensional image display apparatus

  • US 5,689,316 A
  • Filed: 01/18/1996
  • Issued: 11/18/1997
  • Est. Priority Date: 01/08/1992
  • Status: Expired due to Term
First Claim
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1. A depth sampling three-dimensional image real-time display apparatus, comprising:

  • collimated light projecting means configured to project substantially collimated monochromic light;

    a stack of liquid crystal elements, each of which passes substantially all components of the collimated light from the collimated light projecting means without inducing refraction or diffraction, wherein an object of observation has written therein information for causing scattering of said collimated light representative of a three-dimensional image, and wherein;

    D is the probability that a liquid crystal element passes light without inducing refraction or diffraction when no external voltage is applied to the liquid crystal element,d is the probability that light is scattered by the liquid crystal element, andeach liquid crystal element satisfies the relations D+d=1 and D>

    >

    d;

    condenser means for concentrating light passed by the stack of liquid crystal elements;

    filter means for eliminating a direct-flow component of light projected thereon through the condenser means; and

    focalizing lens means for forming a three-dimensional image in an empty space from light passed through the filter means.

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