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Three and five axis laser tracking systems

  • US 4,714,339 A
  • Filed: 02/28/1986
  • Issued: 12/22/1987
  • Est. Priority Date: 02/28/1986
  • Status: Expired due to Term
First Claim
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1. A laser tracking system, comprising:

  • a laser light source (27) for producing a beam (42) of coherent light having first and second beam components of different wavelengths;

    a target point (A) and a tracking point (B) having a separation therebetween;

    first optical means associated with said tracking point for reflecting said first beam component and transmitting said second beam component from said tracking point to said target point;

    second optical means associated with said target point for transmitting a first portion of said second beam component and reflecting a second portion of said second beam component toward said first optical means, said first optical means including means for reflecting said second portion of said second beam component toward said second optical means, and said second optical means including means for transmitting a first part of said second portion and reflecting a second part of said second portion;

    control means (30) for controlling said first optical means to direct said second beam component to said target point and for controlling said second optical means to reflect said second portion resultant from said second beam component back to said tracking point, said control means controlling said first and second optical means in at least two degrees of freedom;

    angular measuring means for measuring said at least two degrees of freedom; and

    means associated with one of said tracking and target points for measuring said separation from said first beam component and at least part of said second portion of said second beam component.

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