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Apparatus and method for remote displaying and sensing of information using shadow parallax

  • US 4,468,694 A
  • Filed: 10/15/1982
  • Issued: 08/28/1984
  • Est. Priority Date: 12/30/1980
  • Status: Expired due to Term
First Claim
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1. Apparatus for detecting the location of an object in a selected area comprising:

  • flying spot scanner means for point by point scanning of said area;

    a plurality of non-concentric sensor means spaced about said area such that each senses an independent shadow on a common perspective of said object in response to the point by point scanning of said flying spot scanner means; and

    means for combining the point by point output of said sensor means to derive a resultant indicative of the location of said object.

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