Infrared and Laser Engineering, Volume. 52, Issue 2, 20220488(2023)

Review on the measurement methods of mirror seeing of large-aperture telescope

Jiakang Zhu1,2, Qichang An1, and Fei Yang1
Author Affiliations
  • 1Changchun Institute of Optics, Fine Mechanics and Physics, Chinese Academy of Sciences, Changchun 130033, China
  • 2University of Chinese Academy of Sciences, Beijing 100049, China
  • show less
    Figures & Tables(20)
    Seeing distribution of Subaru telescope in the whole year[3]
    Measurement results of slope of different mirror reflection distance R measured by autocollimation method [4]
    Measuring system of pentaprism scanning plane[5]
    Curvature/slope wavefront sensor[7-8]
    Using Hartmann-Shack wavefront sensor to measure fence seeing[9]
    [in Chinese]
    Curvature wavefront sensor
    Holographic wavefront sensor [17]
    Performance of holographic wavefront sensor in adaptive system under different modes[21]
    Calibration curves under input mode Z(3,3)[23]
    Four different schlieren imaging system[34]
    Images under different cutting scales of source grid[34]
    Holographic double exposure system [1]
    Flow field with different pulse intervals [1]
    Holographic particle velocimetry[35]
    CFD mode[42]
    Temperature distribution on air and coupling surface at different wind speeds U[42]
    Mirror seeing under different wind speeds and temperature differences [42]
    • Table 1. Comparison of different methods that can be applied to the detection of mirror seeing

      View table
      View in Article

      Table 1. Comparison of different methods that can be applied to the detection of mirror seeing

      MethodClassificationAdvantageDisadvantagePerformance
      TraditionSame path, interference-High cost, slow response-
      1DAutocollimatorSimple structureLimited measurement rangeResolution 0.0003 nPSS
      2DHartmann-Shack WFS/Slope WFSLarger measurement range than 1DComplex mathematics and lowbandwidth in slope WFS; the former can’t work in moderate turbulence Accuracy λ/100, bandwidth 10 kHz
      Holographic WFSNo complex mathematics, simple structure, can work in moderate turbulenceLarger error in large aberration, high mode Accuracy λ/50, bandwidth 15 kHz
      Shear interferenceSimple structure, compact system, low environmental sensitivity Adjust device for orthogonal wavefrontAccuracyλ/100, bandwidth 1 kHz
      Schlieren imagingVisible flow fieldlarge measurement range Limited accuracy-
      3DHolographic particle velocimetry3D imaging, intuitive wayComplex device, offline processing, low accuracy 3D resolution 1 μm, velocity field resolution 0.5 mm
      Temperature fieldSimple and easy to operate, real-time processing Lower accuracy than optic0.1° sensor accuracy equivalent to mirror seeing 0.038″
    • Table 2. Detection method of the mirror seeing of different telescopes

      View table
      View in Article

      Table 2. Detection method of the mirror seeing of different telescopes

      TelescopeDiameter/mMethodResult
      AIMS1Temperature field[50]0.3″(FWHM)
      GREGOR1.5-
      CLST1.8≤0.05″(FWHM)
      ISMAT2.5-
      EST4≤0.05″(FWHM)
      DKIST4.24<0.02″(FWHM)
      SUBARU8.2Camera in main focus0.7″(FWHM)
      KECK II10Scintillation counter0.3″(FWHM)
      GMT25.4-0.9988 (0.5 μm) nature control (nPSS)[51]
      TMT30Temperature field [45]0.9965 (lowest) (nPSS)
    Tools

    Get Citation

    Copy Citation Text

    Jiakang Zhu, Qichang An, Fei Yang. Review on the measurement methods of mirror seeing of large-aperture telescope[J]. Infrared and Laser Engineering, 2023, 52(2): 20220488

    Download Citation

    EndNote(RIS)BibTexPlain Text
    Save article for my favorites
    Paper Information

    Category: Photoelectric measurement

    Received: Jun. 5, 2022

    Accepted: --

    Published Online: Mar. 13, 2023

    The Author Email:

    DOI:10.3788/IRLA20220488

    Topics