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Sensor-illumination system for use in three-dimensional measurement of objects and assemblies of objects

  • US 4,645,348 A
  • Filed: 09/01/1983
  • Issued: 02/24/1987
  • Est. Priority Date: 09/01/1983
  • Status: Expired due to Term
First Claim
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1. A triangulation-type sensor-illuminator assembly for generating image data usable by a machine vision computer to determine three-dimensional measurements of an object comprising:

  • a housing adapted for mounting to a test fixture supporting the object to be examined;

    light source means fixedly mounted at a precise location and orientation within said housing for projecting onto said object a predetermined structured light pattern;

    optical array sensor means for receiving the reflected light image off said object and producing electrical signals whose values are approximately proportional to the intensity of the light impinging upon said sensor means at each resolvable point in its array, said optical sensor means being fixedly mounted within said housing at a precise location and orientation relative to said light source means so that said sensor means obtains a perspective view of the image of said structured light pattern on said object; and

    control circuit means located within said housing and connected to said light source means and said optical sensor means and having stored therein for subsequent transfer to a machine vision computer to which said assembly may be connected, calibration data for said assembly comprising a list identifying with respect to each resolvable point in said sensor array the location in three-dimensional space relative to a reference point associated with said housing, the point at which said object must be located for such resolvable point to be illuminated by the reflected image of said structured light pattern.

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