Long-term study of gauge block interferometer performance and gauge block stability
Long-term study of gauge block interferometer performance and gauge block stability
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DOI：
10.1088/0026-1394/47/4/014
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发表时间：
2010-08-01
期刊：
影响因子：
2.4
通讯作者：
Aldred, Philip J. E.
中科院分区：
文献类型：
--
作者：
Lewis, Andrew J.;Hughes, Ben;Aldred, Philip J. E.
我们报告了一个成功的20年的研究，涉及一个国家计量研究所和商业仪器制造商，在该领域的量块测量光学干涉。国家物理实验室（NPL）用自己的设备和目前在世界各地使用的30台这种仪器的复制品对人工制品的长度进行了测量。在所有31台仪器上测量了几个NPL长度伪影，包括在NPL的同一设备上重复重新测量伪影，持续20年。因此，该数据库允许对这些标准品的时间稳定性以及仪器的长期性能和不断发展的仪器设计进行定量检查。目前拥有这些仪器的许多实验室都参加了国际计量委员会相互承认安排下的国际比对。将这些关键比较的数据与NPL获得的数据相结合，可以进行新的分析-这些数据可以被视为来自国际关键比较，其中人工制品和测量仪器都在参与者中流通-剩余的可变性是由于不同实验室的操作员技能以及其独立可追溯性链的质量。
We report on a successful 20-year study, involving a national metrology institute and a commercial instrument manufacturer, in the field of gauge block measurement by optical interferometry. The National Physical Laboratory (NPL) has made measurements of length artefacts on its own equipment and on 30 copies of this instrument that are now in use worldwide. Several NPL length artefacts have been measured on all 31 instruments including repeated re-measurement of the artefacts on the same equipment at NPL, over a period of 20 years. This pool of data therefore allows for quantitative examination of the temporal stability of these standards as well as the long-term performance of the instruments and of the evolving instrument design. Many of the laboratories which now own these instruments have taken part in international comparisons under the Comite International des Poids et Mesures' Mutual Recognition Arrangement. Combining the data from these key comparisons with the data obtained by NPL allows for a novel analysis-these data can be regarded as coming from an international key comparison, where both the artefact and the measuring instrument are circulated amongst the participants-the remaining variability being due to operator skill at the different laboratories, and the quality of their independent traceability chains.