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Apparatus for and method of measuring distances to objects present in a plurality of directions

  • US 4,916,302 A
  • Filed: 03/28/1988
  • Issued: 04/10/1990
  • Est. Priority Date: 02/09/1985
  • Status: Expired due to Term
First Claim
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1. A method for measuring the distances to objects present in a plurality of directions, comprising the steps of:

  • setting a plurality of measuring regions for each of first and second photodetectors and predetermining a plurality of pairs of regions, each pair having a measuring region from said first photodetector and a measuring region from said second photodetector, each pair being associated with a different direction from one another;

    receiving light from the objects by means of said first photodetector through a first optical system;

    receiving light from the objects by means of said second light receiving surface through a second optical system, said first and second optical systems being disposed in a predetermined relationship to each other;

    taking a correlation between the illumination distributions in said paired regions of said first and second photodetectors; and

    calculating each of the distances to the objects present in different directions corresponding to said plurality of pairs of regions, on the basis of the result of said correlation-taking step for each said pair of regions to measure the distances to the objects.

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