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Proceedings Paper

Uncertainty of gauge block calibration by mechanical comparison: a worked example for gauge blocks of dissimilar materials
Author(s): Jennifer E. Decker; Anthony Ulrich; James R. Pekelsky
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Paper Abstract

The definition of gauge black length,and the lowest- uncertainty gauge block calibrations, derive their link to the definition of the meter through the technique of optical interferometry using calibrated optical wavelengths. Following interferometric calibration of gauge blocks, the technique of mechanical comparison of gauge blocks is largely used for the dissemination of the meter. A measurement scenario for the case of low-uncertainty gauge block calibration in which the working standard and client gauge blocks are made of dissimilar materials is described. The correction for stylus deformation is determined experimentally. A detailed tutorial on evaluating the uncertainties for this gauge block calibration in accordance with the ISO Guide to the expression of uncertainty in measurement is reported, including discussion of degrees of freedom and correlations.

Paper Details

Date Published: 30 September 1998
PDF: 22 pages
Proc. SPIE 3477, Recent Developments in Optical Gauge Block Metrology, (30 September 1998); doi: 10.1117/12.323113
Show Author Affiliations
Jennifer E. Decker, National Research Council Canada (Canada)
Anthony Ulrich, Ulrich Metrology Inc. (Canada)
James R. Pekelsky, National Research Council Canada (Canada)


Published in SPIE Proceedings Vol. 3477:
Recent Developments in Optical Gauge Block Metrology
Jennifer E. Decker; Nicholas Brown, Editor(s)

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