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Method and apparatus for generating a structured light beam array

  • US 4,523,809 A
  • Filed: 08/04/1983
  • Issued: 06/18/1985
  • Est. Priority Date: 08/04/1983
  • Status: Expired due to Fees
First Claim
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1. A method of simultaneouslu generating a space volume-filling structured light beam array for projection upon an object in non-contact surface metrology, comprising the steps of:

  • (a) generating a coherent light beam;

    (b) projecting said beam with slight divergence through a predetermined plane;

    (c) partitioning said beam received at said plane into four light beam segments of predetermined spacing and pattern;

    (d) generating from said beam segment pattern, a two-dimensional array comprising an interference pattern of said beam segments; and

    (e) projecting said array in a direction orthogonal to the plane of the array onto said object.

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