Acta Optica Sinica, Volume. 38, Issue 6, 0628001(2018)

Wavefront Reconstruction by a Defocused Shack-Hartmann Sensor Based on Moment of Spot

Fan Feng1,2,3, Changwei Li1,2, and Sijiong Zhang1,2、*
Author Affiliations
  • 1 Nanjing Institute of Astronomical Optics & Technology, National Astronomical Observatories, Chinese Academy of Sciences, Nanjing, Jiangsu 210042, China;
  • 2 Key Laboratory of Astronomical Optics & Technology, Chinese Academy of Sciences, Nanjing, Jiangsu 210042, China;
  • 3 University of Chinese Academy of Sciences, Beijing 100049, China
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    Figures & Tables(6)
    Conceptual schematics for a single microlens sensing inclined wavefront and curved wavefront. (a) Inclined wavefront on the focal plane; (b) curved wavefront on the focal plane; (c) curved wavefront on a defocused plane; (d) both inclined wavefront and curved wavefront on a defocused plane
    Conceptual schematic for sensing wavefront of defocused Shack-Hartmann wavefront sensor
    Comparison of coefficients of Zernike polynimial coefficients of wavefront reconstruction. (a) Coefficients decomposed by the input wavefront and reconstructed by the conventional and the proposed methods; (b) residuals between true and reconstructed coefficients by the conventional and proposed methods
    Comparison of reconstructed wavefronts by the conventional and proposed methods. (a) Original input wavefront; (b) wavefront reconstructed by conventional method; (c) residual between wavefront reconstructed by conventional method and original input wavefront; (d) wavefront reconstructed by the proposed method; (e) residual between wavefront reconstructed by the proposed method and original input wavefront
    Comparison of reconstructed wavefronts within individual Zernike polynomial
    • Table 1. Reconstructed wavefronts with different coefficients of three aberrations

      View table

      Table 1. Reconstructed wavefronts with different coefficients of three aberrations

      Scaling factor with different Zernike termsInput wavefrontReconstructed wavefront with convensional methodReconstructed wavefront with the proposed method
      15th Zernike term0.2370.109λ0.010λ0.018λ
      0.5280.241λ0.009λ0.016λ
      1.1760.537λ0.012λ0.014λ
      2.6171.196λ0.019λ0.026λ
      5.8252.662λ0.061λ0.098λ
      28th Zernike term0.2370.098λ0.002λ0.003λ
      0.5280.217λ0.003λ0.005λ
      1.1760.483λ0.007λ0.011λ
      2.6171.075λ0.016λ0.038λ
      5.8252.393λ0.402λ1.025λ
      45th Zernike term0.2370.088λ0.009λ0.013λ
      0.5280.131λ0.007λ0.010λ
      1.1760.196λ0.010λ0.010λ
      2.6170.435λ0.013λ0.025λ
      5.8250.969λ0.035λ0.158λ
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    Fan Feng, Changwei Li, Sijiong Zhang. Wavefront Reconstruction by a Defocused Shack-Hartmann Sensor Based on Moment of Spot[J]. Acta Optica Sinica, 2018, 38(6): 0628001

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    Paper Information

    Category: Remote Sensing and Sensors

    Received: Nov. 27, 2017

    Accepted: --

    Published Online: Jul. 9, 2018

    The Author Email: Zhang Sijiong (sjzhang@niaot.ac.cn)

    DOI:10.3788/AOS201838.0628001

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