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Single lens range imaging method and apparatus

  • US 5,703,677 A
  • Filed: 11/14/1995
  • Issued: 12/30/1997
  • Est. Priority Date: 11/14/1995
  • Status: Expired due to Fees
First Claim
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1. A single lens range sensor for determining range information, comprising:

  • (a) a lens;

    (b) an optical sensor constructed and arranged to sense optical energy travelling from a visual scene through said lens;

    (c) at least one optical mask for alternately providing first and second mask functions for masking said sensor to prevent a portion of said optical energy from reaching said sensor, said mask functions being based on at least a differentiable function and a derivative of said differentiable function; and

    (d) range determination means for forming an aperture derivative image of an object in said visual scene, and for determining the range of said object on the basis of at least said aperture derivative image.

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