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Electro-optical position determining system

  • US 4,688,933 A
  • Filed: 05/10/1985
  • Issued: 08/25/1987
  • Est. Priority Date: 05/10/1985
  • Status: Expired due to Term
First Claim
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1. Apparatus for determining the position of at least one light source located and movable within a selected area comprising:

  • light detecting means, for monitoring light means emitted by said at least one light source, at first and second locations, respectively, said first and second locations spaced a first predetermined distance apart along a base line;

    said light detecting means suitable for detecting said light means emitted by said at least one light source located within said selected area, and wherein said light detecting means operates independently of said at least one light source;

    means for determining a first line of detection between said at least one light source and a first light detecting means, said first line of detection occurring when said light means from said at least one light source is detected by said first light detecting means, and wherein said first line determining means operates independently of movement of said at least one light source;

    means for determining a second line of detection between said at least one light source and a second light detecting means, said second line of detection occurring when said light means from said at least one light source is detected by said second light detecting means, and wherein said second line determining means operates independently of movement of said at least one light source;

    means for ascertaining a first angle between said base line and said first line of detection, and for ascertaining a second angle between said base line and said second line of detection; and

    means responsive to said means for ascertaining for determining and providing signals representative of the position of said at least one light source within said selected area.

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