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Ranging system which compares an object-reflected component of a light beam to a reference component of the light beam

  • US 4,533,242 A
  • Filed: 09/28/1982
  • Issued: 08/06/1985
  • Est. Priority Date: 09/28/1982
  • Status: Expired due to Fees
First Claim
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1. A distance measuring system comprising:

  • means for generating a pair of components of a pulse of light, including an object component and a reference component;

    a detector assembly including a detector with opposite ends and a side, said detector formed of a material that produces a harmonic light output that can be detected at a side of the detector when components of a light pulse that are directed into the opposite ends of the detector pass simultaneously in opposite directions through at least a portion of the detector, said assembly also including means for indicating the position of harmonic light output from the detector;

    means for directing the object component toward an object and directing light reflected from the object into a first end of the detector; and

    means for directing the reference component along a reference path of known length and into the second end of the detector to determine the length of the object component path by the precise position at which it crosses the reference component path.

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