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

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TypeTechnical Report
AbstractThe 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 1/299792|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
AffiliationNRC Institute for National Measurement Standards
Peer reviewedNo
NRC number40002
NPARC number8897319
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Record identifier521ea7a1-02c2-4dd7-a4f9-f1290cf53cdc
Record created2009-04-22
Record modified2016-10-03
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