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Method for determining the spatial coordinates of points, application of said method to high-precision topography, system and optical device for carrying out said method

  • US 5,191,385 A
  • Filed: 10/07/1991
  • Issued: 03/02/1993
  • Est. Priority Date: 10/12/1990
  • Status: Expired due to Fees
First Claim
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1. A method for determining the spatial coordinates of points (A) at which are placed elements of an optical system, the optical system comprising an optical device (13) including a pulsed laser source (14) and a detector (16) which is sensitive to the radiation emanating from said laser source (14), and reflectors (10), the method comprising the steps of:

  • emitting pulses of light from said laser source (14);

    forming a conical divergent beam by causing the pulses of laser radiation emanating from the laser source to diverge;

    collecting the radiation reflected from the reflectors (10) in a wide field in order to transmit the same to the detector;

    detecting said pulses of light which are reflected from a reflector and collected, by means of said detector (16);

    measuring the transit times (Dti) of the pulses emitted by the laser source (14), reflected from a reflector (10) and detected by the detector (16); and

    determining relationships between said spatial coordinates in response to said transmit times measured in said step of measuring.

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