PTB'S PROTOTYPE OF A DOUBLE ENDED INTERFEROMETER FOR MEASURING THE LENGTH OF GAUGE BLOCKS

PTB'S PROTOTYPE OF A DOUBLE ENDED INTERFEROMETER FOR MEASURING THE LENGTH OF GAUGE BLOCKS
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PTB 用于测量量块长度的双端干涉仪原型

DOI：
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发表时间：
2010
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通讯作者：
R. Schödel
R. Schödel
中科院分区：
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作者：
A. Abdelaty;Alexander Walkov;A. Abou;R. Schödel

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双端干涉仪（DEI）是一种替代设计，用于可追溯地测量量块形物体的绝对长度，而无需将压板拧到其中一个面上。尽管有这种普遍的优势，但到目前为止，在任何国家计量研究所（NMI）都没有一个完善的DEI系统。PTB作为德国的NMI，计划开发一种专用的DEI，该DEI位于温度稳定的真空室中。在PTB建立了DEI的原型，以研究测量原理和最终设计中要考虑的潜在挑战。本文介绍了实验装置和测量程序的原型。初步结果表明，目前的设计是一个很好的基础，在PTB的DEI的最终版本。1.块规是最重要的材料标准，为行业提供可靠和可追溯的长度标准。当需要最高精度时，通过干涉测量法进行量块的测量，即根据众所周知的波长测量量块的长度。
A double ended interferometer (DEI) is an alternative design for traceable measurement of the absolute length of gauge block shaped bodies without the need of a platen to be wrung to one of the faces. In spite of this general advantage, until now it doesn't exist a well established DEI-system at any National Metrology Institute (NMI). PTB, as the NMI of Germany, plans to develop a dedicated DEI which is situated in a temperature stabilized vacuum chamber. A Prototype of DEI was built at PTB in order to study the measurement principle and potential challenges to be taken into consideration for the final design. This paper describes the experimental set-up and measurement procedures of the prototype. First results indicate that the current design is a good basis for the final version of DEI at PTB. 1. INTRODUCCION Gauge blocks are the most important material standards to provide industry with reliable and traceable standards of length. When highest accuracy is required, the measurement of gauge blocks is performed by interferometry, i.e. the length of the gauge block is measured in terms of well known wavelengths.