Triangulation data integrity

  • US 4,705,395 A
  • Filed: 10/03/1984
  • Issued: 11/10/1987
  • Est. Priority Date: 10/03/1984
  • Status: Expired due to Term
First Claim
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1. An electro-optical system for determining distance to a surface, said system comprising:

  • (a) an electro-optical triangulation sensor comprising;

    (i) a light source for projecting a light beam onto the surface;

    (ii) a light detector means for receiving the light reflected from the surface when the light beam is projected thereon and for producing an output in accordance therewith; and

    (iii) means responsive to the output of said light detector for determining the distance to the surface;

    (b) a reference detector means for independently sensing the light reflected from said surface when the light beam is projected thereon and for producing an output in accordance therewith; and

    (c) control means, responsive to the output of said reference detector means, for controlling an operating characteristic of said triangulation sensor based exclusively on the output of said reference sensor.

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