Interferometric determination of the topographies of absolute sphere radii using the sphere interferometer of PTB
Interferometric determination of the topographies of absolute sphere radii using the sphere interferometer of PTB
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DOI：
10.1088/0957-0233/21/11/115101
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发表时间：
2010-11-01
影响因子：
2.4
通讯作者：
Giardini, Walter
中科院分区：
文献类型：
--
作者：
Bartl, Guido;Krystek, Michael;Giardini, Walter
本文提出了一种重建球体绝对形状的方法。利用PTB球面干涉仪结合拼接方法，得到了半径型的地形。该方法允许重建绝对半径，而不是由常规球度测量产生的相对形状偏差。球体干涉仪是为测量球形物质的体积而开发的——特别是阿伏伽德罗项目中的球体——通过精确的直径测量，不确定度为1纳米或更小。在本工作的范围内，已经实现了一个程序，该程序将干涉仪的适用性扩展到感兴趣的不是体积或直径而是方向相关半径的场。重建结果与CSIRO独立的球度测量结果进行了定量比较。
This paper presents a method to reconstruct the absolute shape of a sphere-i.e. a topography of radii-using the sphere interferometer of PTB in combination with a stitching approach. The method allows for the reconstruction of absolute radii instead of the relative shape deviations which result from conventional sphericity measurements. The sphere interferometer was developed for the volume determination of spherical material measures-in particular the spheres of the Avogadro project-by precise diameter measurements with an uncertainty of 1 nm or less. In the scope of the present work a procedure has been implemented that extends the applicability of the interferometer to fields where not the volume or diameter but the direction-dependent radii are of interest. The results of the reconstruction were compared quantitatively to the independent results of sphericity measurements from CSIRO.