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.
Download:
IMEKO-TC14-2011-40.pdf
DOI:
-
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
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