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A MULTIWAVELENGTH INTERFEROMETER FOR GEODETIC LENGTHS

K. Meiners-Hagen, P. Köchert, A. Abou-Zeid
  • Abstract:
    Within the EURAMET joint research project "Absolute Long-distance Measurement in Air" an absolute measuring heterodyne interferometer was developed for a measuring range of 1 km with a targeted accuracy of 0.1 mm. Since one dominating uncertainty source for interferometric length measurement is the refractiveindex of air, especially under outdoor conditions, a two wavelength compensation method is integrated in the set-up. Measurements were performed on a 50 m comparator equipped with a HeNe laser interferometer.
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  • DOI:
    _unreg_tc14-2011.40

Event details:

  • IMEKO TC:
    TC14
  • Event name:
    TC14 LMPMI Symposium 2011
  • Title:

    10th Symposium on Laser Metrology for Precision Measurement and Inspection in Industry

  • Place:
    Braunschweig, GERMANY
  • Time:
    12 September 2011 - 14 September 2011