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Method of sensing the position and orientation of elements in space

  • US 4,488,173 A
  • Filed: 02/04/1983
  • Issued: 12/11/1984
  • Est. Priority Date: 08/19/1981
  • Status: Expired due to Term
First Claim
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1. A method of sensing the positional orientation of elements in space, comprising the steps of:

  • providing a plurality of light sensors on an element which is movable in space;

    said element comprising a transparent plate having patterns projected thereon;

    providing a pair of light projectors at positions spaced from said element;

    directing light beams from said projectors at said light sensors;

    modulating the angular position of said light beams over time; and

    correlating the time of illumination of each sensor with the position of the projected beam at the time of such illumination, so as to determine the angular position of each sensor with respect to each of said projectors.

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