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Accurate target orientation measuring system

  • US 7,400,416 B2
  • Filed: 01/06/2006
  • Issued: 07/15/2008
  • Est. Priority Date: 01/07/2005
  • Status: Active Grant
First Claim
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1. A system for accurate target orientation measurement, comprising:

  • a target capable of pitch and yaw movements;

    a measurement retro-reflector disposed within the target for transmitting a received laser beam, the measurement retro-reflector having an aperture disposed therein for transmitting the laser beam;

    a reference retro-reflector disposed within the target for transmitting only background radiation, wherein the reference retro-reflector is substantially similar to the measurement retro-reflector and is located adjacent to the measurement retro-reflector;

    a laser light sensor that registers an image of the transmitted laser beam and the transmitted background radiation; and

    a processing unit that receives position information of the laser beam image and the background radiation image and determines pitch and yaw movement of the target based on the received position information, wherein a size of the aperture is smaller than a critical size above which the background radiation image interferes with the laser beam image, the background radiation image formed from the background light radiation.

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