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Chinese Optics Letters, Volume. 15, Issue 11, 111201(2017)

Encoding method of CGH for highly accurate optical measurement based on non-maxima suppression

Xisheng Xiao1,2,3, Qinghua Yu1,2、*, Zhentao Zhu1,2,3, Kai Hu1,2, and Guilin Chen1,2
Author Affiliations
  • 1Shanghai Institute of Technical Physics of the Chinese Academy of Sciences, Shanghai 200083, China
  • 2Key Laboratory of Infrared System Detection and Imaging technology, Chinese Academy of Sciences, Shanghai 200083, China
  • 3University of Chinese Academy of Sciences, Beijing 100049, China
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    Figures&Tables (13)
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    References (13)
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    CGH-encoding process. (a) Generating binary fringes using phase contour interferograms. (b) Encoding the fringes into polygons.

    Fig. 1. CGH-encoding process. (a) Generating binary fringes using phase contour interferograms. (b) Encoding the fringes into polygons.

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    Deviations introduced by encoding.

    Fig. 2. Deviations introduced by encoding.

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    Digitalization and non-maxima suppression processes.

    Fig. 3. Digitalization and non-maxima suppression processes.

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    Deviation induced by digitalizing the curve.

    Fig. 4. Deviation induced by digitalizing the curve.

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    Deviation induced by non-maxima suppression.

    Fig. 5. Deviation induced by non-maxima suppression.

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    Result of non-maxima suppression.

    Fig. 6. Result of non-maxima suppression.

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    Statistics of the suppression errors.

    Fig. 7. Statistics of the suppression errors.

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    Used self-aligned CGH to verify the encoding accuracy.

    Fig. 8. Used self-aligned CGH to verify the encoding accuracy.

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    Layout of the CGH.

    Fig. 9. Layout of the CGH.

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    Substrate error.

    Fig. 10. Substrate error.

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    Testing the reflecting wave-front generated by the CGH.

    Fig. 11. Testing the reflecting wave-front generated by the CGH.

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    Experimental result.

    Fig. 12. Experimental result.

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    • Table 1. Error Estimation

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      Table 1. Error Estimation

      CGH ErrorsWave-front Phase Error/λ
      Substrate error0.024
      Pattern distortion error∼0.03
      Encoding error<0.02
      Whole path RSS error<0.041
      Single path RSS error<0.0205
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    Xisheng Xiao, Qinghua Yu, Zhentao Zhu, Kai Hu, Guilin Chen, "Encoding method of CGH for highly accurate optical measurement based on non-maxima suppression," Chin. Opt. Lett. 15, 111201 (2017)

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    Paper Information

    Category: Instrumentation, measurement, and metrology

    Received: Jun. 20, 2017

    Accepted: Aug. 11, 2017

    Published Online: Jul. 19, 2018

    The Author Email: Qinghua Yu (yuqinghua2000@126.com)

    DOI:10.3788/COL201715.111201

    Topics

    laser devices and laser physics
    Lasers and Laser Optics
    Laser physics
    laser manufacturing
    Instrumentation, Measurement and Metrology