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Method and apparatus for three-dimensional optical measurement of object surfaces

  • US 5,307,151 A
  • Filed: 07/30/1992
  • Issued: 04/26/1994
  • Est. Priority Date: 09/11/1991
  • Status: Expired due to Fees
First Claim
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1. A method for the three-dimensional optical measuring of an object surface area defining ambiguous object coordinates, said method comprising:

  • projecting a grating pattern on said object surface;

    recording said projected grating pattern on two video cameras, each said camera having a plurality of pixels, and said projected grating pattern being recorded on each camera as an image pattern with a plurality of image points; and

    using an analytical computer connected with said video cameras to compute the topography of said object surface by;

    separately computing fringe phases for the image patterns recorded by each camera, andusing a combination of said separate fringe phases of both cameras to compute unambiguous object coordinates within a predetermined measuring area.

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