A Just et al 2003 Metrologia 40 288 doi:10.1088/0026-1394/40/5/011
A Just, M Krause, R Probst and R Wittekopf
Show affiliationsAt the Physikalisch-Technische Bundesanstalt, autocollimators are calibrated with the aid of the WMT 220 angle comparator to ensure their direct traceability to the SI unit of plane angle, the radian (rad). It is shown that high-resolution electronic autocollimators can thus be calibrated with an uncertainty of 0.007 arcsec (k = 2) in reproducible measurement steps down to 0.005 arcsec. Calibrations in very small measurement steps close to the autocollimators' resolution can inform about possible short-period deviations and resulting aliasing effects in measurements with autocollimators.
07.07.Df Sensors (chemical, optical, electrical, movement, gas, etc.); remote sensing
Issue 5 (October 2003)
Received 28 May 2003
Published 11 September 2003
A Just et al 2003 Metrologia 40 288
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