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Remote tracking system particularly for moving picture cameras and method

  • US 5,179,421 A
  • Filed: 08/20/1990
  • Issued: 01/12/1993
  • Est. Priority Date: 08/20/1990
  • Status: Expired due to Term
First Claim
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1. A method of calculating the angular displacement of an object with respect to a reference angle and moving a movable means to track the object in response thereto comprising:

  • A. transmitting at the location of the object a signal from a radiant energy source into an area;

    B. scanning the area, independently of moving the movable means, for the transmitted signal by varying the view angle through which the transmitted signal can be received during a time interval;

    C. receiving by a receiver the transmitted signal through the view angle;

    D. determining the point in the time interval at which each angular position of the view angle occurs during the time interval;

    E. computing the angular displacement of the object with respect to the reference angle by comparing the point in the time interval at which the receiver received the transmitted signal with the angular position of the view angle through which the signal was received with respect to the same point in the time interval; and

    F. moving the movable means, independently of scanning the area, in response to the results obtained in step E to track the object.

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