Optical Instruments, Volume. 46, Issue 4, 14(2024)

Centroid detection of Shack-Hartmann wavefront sensor in scanning ocular wavefront aberration measurement system

Wenhao ZHOU1...3, Peijie LIU2,3, Kun SHANG3, Xi ZENG3, Shijun GUO3 and Chuanqing ZHOU3,* |Show fewer author(s)
Author Affiliations
  • 1School of Health Science and Engineering, University of Shanghai for Science and Technology, Shanghai 200093, China
  • 2School of Optical-Electrical and Computer Engineering, University of Shanghai for Science and Technology, Shanghai 200093, China
  • 3College of Medical Instruments, Shanghai University of Medicine and Health Sciences, Shanghai 201318, China
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    Figures & Tables(11)
    Working principle of Shack-Hartmann wavefront sensor
    Algorithm flowchart
    Single sub-aperture with large noise
    Selects the optimal window with Suzuki contour tracking algorithm
    Wavefront acquisition setup
    Noisy spot image of spherical wavefront
    Original image and randomly noised image
    Comparison of resultant images processed with different algorithms
    • Table 1. Parameter comparison for plane waves

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      Table 1. Parameter comparison for plane waves

      图号 噪声Vpv/λVrms/λ
      传统方法本文方法传统方法本文方法
      7(a)无噪声0.155 240.142 990.039 140.036 78
      7(b)大噪声1.600 990.145 720.342 130.036 79
      7(c)大噪声3.726 130.155 890.668 510.036 87
      7(d)大噪声2.554 090.150 000.665 250.036 79
      7(e)大噪声5.268 430.148 870.914 310.036 78
      7(b)大噪声+椒盐1.600 990.153 010.341 910.038 01
      7(c)大噪声+椒盐3.731 260.153 290.668 470.036 81
      7(d)大噪声+椒盐2.552 670.144 450.664 990.036 73
      7(e)大噪声+椒盐5.268 430.150 330.914 480.036 75
    • Table 2. Comparison of Vpv for different spherical waves

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      Table 2. Comparison of Vpv for different spherical waves

      球面波半径/mm Vpv/λ
      原图大噪声大噪声+椒盐理论值
      538.44.385 054.382 714.385 524.370 26
      588.44.009 684.012 864.009 293.998 89
      638.43.701 043.703 193.703 963.685 69
      688.43.445 153.442 253.443 423.417 99
      738.43.209 583.209 463.214 493.186 54
      788.42.998 503.003 493.009 362.984 46
      838.42.815 402.820 122.820 122.806 47
      888.42.672 472.671 382.670 152.648 52
      938.42.526 222.523 612.523 992.507 40
      988.42.411 862.411 742.410 242.380 55
    • Table 3. Comparison of Vrms for different spherical waves

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      Table 3. Comparison of Vrms for different spherical waves

      球面波半径/mmVrms/λ
      原图大噪声大噪声+椒盐
      538.40.003 120.003 330.003 53
      588.40.003 530.002 880.002 64
      638.40.003 330.002 880.002 88
      688.40.003 720.003 530.003 53
      738.40.007 150.007 060.007 44
      788.40.002 040.004 550.005 88
      838.40.001 660.002 040.002 04
      888.40.003 330.003 720.003 33
      938.40.003 530.003 720.003 53
      988.40.003 910.004 400.004 25
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    Wenhao ZHOU, Peijie LIU, Kun SHANG, Xi ZENG, Shijun GUO, Chuanqing ZHOU. Centroid detection of Shack-Hartmann wavefront sensor in scanning ocular wavefront aberration measurement system[J]. Optical Instruments, 2024, 46(4): 14

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    Paper Information

    Category: OPTICAL SENSING AND IMAGING TECHNOLOGY

    Received: Jan. 29, 2024

    Accepted: Jan. 29, 2024

    Published Online: Nov. 14, 2024

    The Author Email: ZHOU Chuanqing (zhoucq@sumhs.edu.cn)

    DOI:10.3969/j.issn.1005-5630.202401290015

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