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Method and arrangement for target seeking

  • US 5,828,057 A
  • Filed: 05/12/1997
  • Issued: 10/27/1998
  • Est. Priority Date: 09/14/1995
  • Status: Expired due to Fees
First Claim
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1. Method for searching for targets, where an instrument emits an electromagnetic radiation and searches for a target reflector by detecting if reception takes place of a received electromagnetic radiation reflected from the target reflector back to the instrument, characterized in that in the radiation direction of the electromagnetic radiation, the following procedural steps take place after one another:

  • a. polarization of the electromagnetic radiation;

    b. polarization modulation of the polarization direction of the electromagnetic radiation through alternately changing it;

    c. polarization of the electromagnetic radiation;

    wherein at least one of the procedural steps mentioned under points a) to c) is performed near to the target reflector (11); and

    checking of the detected reflector is performed by testing if the received radiation changes alternately at the same rate as the modulation of the polarization direction, and only accepting a target which gives different signal strengths for the received radiation at said rate.

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