Invention Grant
US08654342B2 Interferometric distance-measuring method with delayed chirp signal and such an apparatus 有权
具有延迟线性调频信号的干涉测距法和这种装置

  • Patent Title: Interferometric distance-measuring method with delayed chirp signal and such an apparatus
  • Patent Title (中): 具有延迟线性调频信号的干涉测距法和这种装置
  • Application No.: US12937529
    Application Date: 2009-05-29
  • Publication No.: US08654342B2
    Publication Date: 2014-02-18
  • Inventor: Thomas JensenMarcel Rohner
  • Applicant: Thomas JensenMarcel Rohner
  • Applicant Address: CH Heerbrugg
  • Assignee: Leica Geosystems AG
  • Current Assignee: Leica Geosystems AG
  • Current Assignee Address: CH Heerbrugg
  • Agency: Maschoff Brennan
  • Priority: EP08104146 20080528
  • International Application: PCT/AZ2009/000003 WO 20090529
  • International Announcement: WO2010/000044 WO 20100107
  • Main IPC: G01B9/02
  • IPC: G01B9/02
Interferometric distance-measuring method with delayed chirp signal and such an apparatus
Abstract:
In a distance-measuring method comprising a distance-measuring apparatus having at least one frequency-modulatable laser source for producing chirped laser radiation. The laser radiation has radiation components with opposite chirp as time dependency of the modulated wavelengths, the simultaneous oppositeness of the frequency curve being realized via an optical delay path (3) for one of the two radiation components. The radiation produced is passed in a measuring interferometer (5) to a target (6) and parallel via a local Oscillator. After reception of the laser radiation scattered back from the target (6) and passed via the local oscillator path, the laser radiation received is converted into signals and the distance to the at least one target (6) is determined from the signals on the basis of interferometric mixing.
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