Infrared and Laser Engineering, Volume. 51, Issue 7, 20210744(2022)

Analysis of performance evaluation methods of wide-field ground-layer adaptive optics

Ying Yang1,2,3, Lanqiang Zhang1,2,3, and Changhui Rao1,2,3、*
Author Affiliations
  • 1The Key Laboratory of Adaptive Optics, Chinese Academy of Sciences, Chengdu 610209, China
  • 2Institute of Optics and Electronics, Chinese Academy of Sciences, Chengdu 610209, China
  • 3University of Chinese Academy of Sciences, Beijing 100049, China
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    Figures & Tables(10)
    Schematic diagram of GS with different numbers and arrangements
    Schematic diagram of GS with different SFOV
    Schematic diagram of FOV annulus
    GLAO average correction effect of FOV by different models. "o" line denotes the GLAO in open loop, and others denote different numbers of GSs in close loop. (a) Spatial frequency spectrum filtering model; (b) Monte Carlo model
    GLAO average correction effect of FOV by different models. (a) Spatial frequency spectrum filtering model; (b) Monte Carlo model; (c) The value variance between two models
    GLAO average correction of FOV annulus under different turbulence profile. "o" line denotes the GLAO in open loop, "" and "" denotes the GLAO in close loop with single ring and "1+5" with double rings GSs. From top to bottom: r0=15 cm,r0=10 cm,r0=7 cm.From left to right: Spatial frequency spectrum filtering model, Monte Carlo model and the value variance between two models不同湍流环境下各视场环带平均校正效果图,其中“o”虚线代表开环,“”与“”分别代表导引星呈单环与双环“1+5”下系统闭环校正效果。从上至下代表所处湍流强度r0分别为15、10、7 cm,从左至右分别代表空间频谱滤波模型、蒙特卡洛模型及两种模型的差值
    The value variance of different frame numbers under two models
    • Table 1. Parameter of the system

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      Table 1. Parameter of the system

      Basic parameterSpatial spectrum filterMonte Carlo
      Telescope diameter2.5 mCut-off frequency1 m−1Sampling period0.7 s
      FOVΦ5′ Sampling rate64Frame number500
      Sensing/Imaging wavelength0.55/0.705 μmOuter scale turbulence ${{L} }_{ { {{0} } } }$30 mTurbulence phase screenLayers number7
      Grids number4096 $ \times $4096(1-4) 8192 $ \times $8192(5-7)
    • Table 2. Turbulence profile model of CP-7

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      Table 2. Turbulence profile model of CP-7

      hi1234567
      Height/km01.803.205.807.4013.0015.80
      Fractional ${{C} }_{{n} }^{ {{2} } }$0.6460.0780.1190.0350.0250.080.015
    • Table 3. Relationship between seeing and r0

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      Table 3. Relationship between seeing and r0

      r0/cm ≤88-1515-20≥20
      SeeingBadTypicalGoodGreat
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    Ying Yang, Lanqiang Zhang, Changhui Rao. Analysis of performance evaluation methods of wide-field ground-layer adaptive optics[J]. Infrared and Laser Engineering, 2022, 51(7): 20210744

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    Paper Information

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    Received: Oct. 9, 2021

    Accepted: --

    Published Online: Dec. 20, 2022

    The Author Email: Changhui Rao (chrao@ioe.ac.cn)

    DOI:10.3788/IRLA20210744

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