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Proceedings Paper

Next-generation Kösters interferometer
Author(s): Jennifer E Decker; Rene Schodel; Gerhard Bonsch
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Paper Abstract

Modification of an interferometer instrument for highest accuracy calibration of long gauge blocks is presented. The interferometer design employs a Kosters prism, and a built-in 1 metre long vacuum cell for evaluation of refractive index of air in the direct neighborhood of the gauge block. The measurement set-up also includes platinum resistance thermometers and thermocouples for accurate measurements of gauge block temperature. Principles of the measurement method, including the application of phase stepping interferometry to both the length measurement and the correction for refractive index of air, are described in detail.

Paper Details

Date Published: 20 November 2003
PDF: 10 pages
Proc. SPIE 5190, Recent Developments in Traceable Dimensional Measurements II, (20 November 2003); doi: 10.1117/12.503565
Show Author Affiliations
Jennifer E Decker, National Research Council (Canada)
Rene Schodel, Physikalisch-Technische Bundesanstalt (Germany)
Gerhard Bonsch, Physikalisch-Technische Bundesanstalt (Germany)

Published in SPIE Proceedings Vol. 5190:
Recent Developments in Traceable Dimensional Measurements II
Jennifer E. Decker; Nicholas Brown, Editor(s)

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