Gauge block calibration by optical interferometry at the National Research Council Canada

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Author	Search for: Decker, J. E.¹; Search for: Pekelsky, J. R.¹
Affiliation	National Research Council Canada. NRC Institute for National Measurement Standards
Sponsor	Search for: National Research Council Canada
Format	Text, Article
Conference	Measurement Science Conference, January 23–24, 1997, Pasadena, California, United States
Abstract	The definition of the SI unit for length, the metre, is the length of the path travelled by light in a vacuum during a time interval of 1/299 792 458 of a second. Optical interferometry offers a measuring method to determine the number of wavelengths of light that span the length of the gauge block. The instrumentation and methods developed at the National Research Council of Canada (NRC) for this specialized interferometric technique are described. Also discussed are the details of the measurement procedure. An outline of the uncertainty attributed to this system is evaluated in accordance with the ISO Guide to the Uncertainty in Measurement. Finally, planned improvements to the NRC system are briefly discussed.
Publication date	1997
Language	English
NRC number	NRCC 40002 NRC-INMS-243
NPARC number	8897319
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Record identifier	521ea7a1-02c2-4dd7-a4f9-f1290cf53cdc
Record created	2009-04-22
Record modified	2025-12-18

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