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In situ monitoring and controlling surface shape of the polishing pad in continuous polishing

机译:在连续抛光中原位监测和控制抛光垫的表面形状

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摘要

High-power laser devices have stringent requirements for the surface accuracy of optical elements. Continuous polishing is an effective technique for polishing high-precision optical elements. To overcome the problem of poor real-time capability and low accuracy in traditional surface shape monitoring and controlling methods used in continuous polishing, an online monitoring device is developed to monitor the surface shape of the polishing pad. The experimental results of the online measurement are highly consistent with the offline results obtained using an interferometer. The correctness and feasibility of the online monitoring scheme are well validated. Based on the online monitoring device for the surface shape of the polishing pad, we propose a method of automatic control for the surface shape of the polishing pad. This method maintains the flatness of the polishing pad to 0.05a (a = 632.8 nm), peak to valley, as measured on a 100-mm monitoring element through computer control.
机译:大功率激光装置对光学元件的表面精度有严格的要求。连续抛光是抛光高精度光学元件的有效技术。为了克服连续抛光中传统的表面形状监测和控制方法中实时性差,精度低的问题,开发了一种在线监测装置来监测抛光垫的表面形状。在线测量的实验结果与使用干涉仪获得的离线结果高度一致。在线监测方案的正确性和可行性得到了充分验证。基于在线监测抛光垫表面形状的装置,我们提出了一种自动控制抛光垫表面形状的方法。这种方法可将抛光垫的平整度保持在0.05a(a = 632.8 nm)的峰值到谷值,这是通过计算机控制在100毫米监控元件上测得的。

著录项

  • 来源
    《Optical engineering》 |2018年第7期|074103.1-074103.8|共8页
  • 作者单位

    Chinese Academy of Science, Shanghai Institute of Optics and Fine Mechanics, National Laboratory on High Power Laser and Physics, Shanghai, China,University of the Chinese Academy of Science, Beijing, China;

    Chinese Academy of Science, Shanghai Institute of Optics and Fine Mechanics, National Laboratory on High Power Laser and Physics, Shanghai, China;

    Chinese Academy of Science, Shanghai Institute of Optics and Fine Mechanics, National Laboratory on High Power Laser and Physics, Shanghai, China,University of the Chinese Academy of Science, Beijing, China;

    Chinese Academy of Science, Shanghai Institute of Optics and Fine Mechanics, National Laboratory on High Power Laser and Physics, Shanghai, China;

  • 收录信息 美国《科学引文索引》(SCI);美国《工程索引》(EI);
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

    continuous polishing; surface shape of polishing pad; in situ monitor and control;

    机译:连续抛光;抛光垫的表面形状;原位监控;

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