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Production sequence of Si-spheres and interferometrical determination of the sphere volume

Length and Angle Graduations

Working Group 5.21

Measurement comparisions

Angle-Measurement comparisions

  • International comparison of angle standards, 1981-1986, CCDM Report 1990.12.1
  • Intercomparison of the measurement of angular gauge blocks; 1988-1990, BCR, Report EUR 14058 EN
  • Intercomparison of the measurement of angular gauge blocks, 1989-1991, WECC, report of the WECC Interlaoratory Comparison M12
  • Angle calibration on precision polygons, 1996-1999, EUROMET 371, PTB-Bericht F-43
  • Comparison of optical polygons, 1999, COOMET Project 133/SK/96
  • Comparison of squareness measurements, 2000-2002, EUROMET Supplementary comparison 570
  • Calibration of angle standards, 2000-2002, Key comparison CCL-K3,
  • Internatonaler Maßvergleich an einem Drehgeber RON 905 zwischen der Fa. Johannes Heidenhain, dem AIST Japan und der PTB, 1999
  • Bilateraler Maßvergleich an einem Drehgeber ERP 880 zwischen der Fa. Johannes Heidenhain und der PTB, 2004