| Alternative title | Report on CCL Key Comparison: measurement of optical polygons: CCL-K3.n01: final report |
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| Download | - View final version: CCL-K3.n01: angle standards: optical polygon: key comparison (PDF, 3.8 MiB)
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| DOI | Resolve DOI: https://doi.org/10.59161/KETH1559 |
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| Author | Search for: Eves, Brian John1ORCID identifier: https://orcid.org/0000-0003-2481-0334; Search for: Shihua, Wang; Search for: Hernandez, M del Mar Perez; Search for: Yshikawa, Francisco Huerta; Search for: Vieira, Luiz Henrique Brum; Search for: Astrua, Milena; Search for: Lee, Yae Yong; Search for: Xue, Zi; Search for: Watanabe, Tsukasa; Search for: Yandayan, Tanfer |
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| Affiliation | - National Research Council Canada. Metrology Research Centre
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| Format | Text, Technical Report |
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| Abstract | At its meeting in 2014, the Consultative Committee for Length (CCL) WG-MRA decided upon a key comparison on the measurement of angle standards. Initially the comparison was to include both optical polygons and angle encoders, however, the comparison was eventually scaled back to only include optical polygons. The comparison was also delayed due to a change in pilot laboratory, and artifact circulation was started in April 2023 and completed in September 2025. Two optical polygons by different manufacturers were circulated: a 12-sided polygon similar to one used in the EURAMET.L-K3.n01 comparison, and a 10-sided polygon similar to the polygon used in the SIM.L-K3-2019 comparison. Unfortunately, the 12-sided polygon was not stable for the duration of the comparison and an additional artifact stability term was added in quadrature to the participants 12-sided polygon reported uncertainties. The vast majority of participants successfully supported their uncertainty claims. |
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| Publication date | 2026-02-20 |
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| Publisher | Bureau International des Poids et Mesures |
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| Licence | |
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| In | |
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| Language | English |
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| Peer reviewed | Yes |
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| Export citation | Export as RIS |
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| Report a correction | Report a correction (opens in a new tab) |
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| Record identifier | 07e59cfc-105a-44e4-a7e7-fcd826a6d241 |
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| Record created | 2026-03-25 |
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| Record modified | 2026-04-16 |
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