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Proceedings Paper

Domestic round-robin tests in Japan for about 40 years
Author(s): Katuo Seta; Yasushi Ishii; Hirokazu Matsumoto
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Paper Abstract

The domestic round-robin testing for interferometric length measurements of gauge blocks was initiated in 1960 in Japan, to evaluate and also to improve the proficiency of calibration laboratories. It had been arranged by the National Research Laboratory of Metrology (NRLM) and Japan Precision Measuring Instrument Association 16 times prior to 1992. A 100 mm gauge block was used as the test object on each occasion and measurement result of the NRLM was used as the reference value. When the difference between the result of each laboratory and the NRLM was larger than 30 nm, the laboratory repeated the measurement and the reason for the discrepancy was investigated. About 10 laboratories, including those of local governments, private companies and semigovernment organizations, participated regularly and many of them maintained their proficiency in the measurement of gauge blocks.

Paper Details

Date Published: 30 September 1998
PDF: 8 pages
Proc. SPIE 3477, Recent Developments in Optical Gauge Block Metrology, (30 September 1998); doi: 10.1117/12.323119
Show Author Affiliations
Katuo Seta, National Research Lab. of Metrology (Japan)
Yasushi Ishii, Japan Quality Assurance Organization (Japan)
Hirokazu Matsumoto, National Research Lab. of Metrology (Japan)


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

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