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能量天平激光干涉测量系统闲区长度测量方法研究

白洋 鲁云峰 廖福剑 王越 李正坤

白洋,鲁云峰,廖福剑,等. 能量天平激光干涉测量系统闲区长度测量方法研究[J]. 计量科学与技术,2022, 66(4): 34-39 doi: 10.12338/j.issn.2096-9015.2021.0586
引用本文: 白洋,鲁云峰,廖福剑,等. 能量天平激光干涉测量系统闲区长度测量方法研究[J]. 计量科学与技术,2022, 66(4): 34-39 doi: 10.12338/j.issn.2096-9015.2021.0586
BAI Yang, LU Yunfeng, LIAO Fujian, WANG Yue, LI Zhengkun. Research on Dead-Path Measurement in Interferometer System of Joule Balance[J]. Metrology Science and Technology, 2022, 66(4): 34-39. doi: 10.12338/j.issn.2096-9015.2021.0586
Citation: BAI Yang, LU Yunfeng, LIAO Fujian, WANG Yue, LI Zhengkun. Research on Dead-Path Measurement in Interferometer System of Joule Balance[J]. Metrology Science and Technology, 2022, 66(4): 34-39. doi: 10.12338/j.issn.2096-9015.2021.0586

能量天平激光干涉测量系统闲区长度测量方法研究

doi: 10.12338/j.issn.2096-9015.2021.0586
基金项目: 国家自然科学基金青年基金资助项目(51805507)。
详细信息
    作者简介:

    白洋(1988-),中国计量科学研究院副研究员,研究方向:千克量子化定义与复现,邮箱:baiyang@nim.ac.cn

    通讯作者:

    李正坤(1977-),中国计量科学研究院研究员,研究方向:电磁计量与千克新定义复现,邮箱:lzk@nim.ac.cn

Research on Dead-Path Measurement in Interferometer System of Joule Balance

  • 摘要: 闲区误差是激光干涉测量系统中一项重要的误差来源,但闲区长度难以准确测量。能量天平是我国溯源至普朗克常数的质量测量装置,在该装置中激光干涉测量系统用于对悬挂线圈和激励磁体的相对位移进行测量,但较长的光学闲区影响了能量天平装置在空气环境工作时的位移测量准确性。针对上述问题,本文提出了基于真空空气光程差测量的光学闲区长度测量方法,该方法利用真空系统改变测量光路所在的气压,测量由空气折射率变化引入的光程差,进而计算激励干涉光路与悬挂线圈干涉光路之间光学闲区的长度。该方法可以将光学闲区长度测量不确定度由毫米量级缩小至微米量级。另外,本文利用光学闲区长度表征的绝对距离,对能量天平激励磁体和悬挂线圈的竖直方向初始相对位置进行了测量,以确定二者竖直方向的相对零位。
  • 图  1  能量天平激光干涉测量系统

    Figure  1.  Laser interferometer system in joule balance

    图  2  双轴干涉镜组

    Figure  2.  Dual-axis laser interferometer

    图  3  激光干涉位移测量系统的光学闲区示意图

    Figure  3.  Optical dead-path in laser interferometer system

    图  4  能量天平光学闲区示意图

    Figure  4.  Optical dead-path in joule Balance

    图  5  真空/空气环境光程差测量实验结果

    Figure  5.  Optical path difference between vacuum and atmosphere environment

    图  6  激励磁体与悬挂线圈的中心距

    Figure  6.  Center to center difference between exciting magnet and suspended coil

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出版历程
  • 网络出版日期:  2022-03-21
  • 刊出日期:  2022-06-02

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