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Figure 6
Distributions of the positioning error measured with an autocollimator (DA200) and their fitting by a normal distribution. The X and Y directions of the autocollimator are perpendicular and parallel to the rotary axis, respectively. The errors in the Y direction correspond to intrinsic uncertainties of the measurement system, which are caused by the atmospheric fluctuation and instrumental resolution of the autocollimator. The standard deviations in the X and Y directions are 0.27 and 0.15 arcsec, respectively. The error distribution in the X direction is considered to be enlarged by the deviation from circularity of the rolling bearing.

Journal logoJOURNAL OF
SYNCHROTRON
RADIATION
ISSN: 1600-5775
Volume 5| Part 3| May 1998| Pages 955-957
https://doi.org/10.1107/S0909049598001253
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