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Acta Optica Sinica, Volume. 40, Issue 18, 1822001(2020)

Design of Off-Axis Four-Mirror Optical Antenna with Long Exit Pupil Distance

Qijie Tian*, Jianhua Zhang, Huanhuan Zhang, Yansong Song, Jingjing Xue, Xinrong Hu, Xiang Chen, and Shuai Li
Author Affiliations
  • China Academy of Space Technology (Xi'an), Xi'an, Shaanxi 710100, China
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    AbstractGet PDF(in Chinese)
    Figures&Tables (15)
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    References (21)
    Cited By (3)
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    Figures & Tables(15)
    Keplerian afocal system

    Fig. 1. Keplerian afocal system

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    Galilean afocal system

    Fig. 2. Galilean afocal system

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    Layout of coaxial three-mirror system

    Fig. 3. Layout of coaxial three-mirror system

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    Layout of off-axis four-mirror optical antenna

    Fig. 4. Layout of off-axis four-mirror optical antenna

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    Layout of initial structure of off-axis optical antenna

    Fig. 5. Layout of initial structure of off-axis optical antenna

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    Spot diagrams of top 12 FOVs of initial structure

    Fig. 6. Spot diagrams of top 12 FOVs of initial structure

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    MTF curves of initial structure

    Fig. 7. MTF curves of initial structure

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    Layout of optical antenna after optimization

    Fig. 8. Layout of optical antenna after optimization

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    Spot diagrams of top 12 FOVs of optical antenna after optimization

    Fig. 9. Spot diagrams of top 12 FOVs of optical antenna after optimization

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    Diffraction encircled energy of optical antenna after optimization

    Fig. 10. Diffraction encircled energy of optical antenna after optimization

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    RMS wavefront error of optical antenna after optimization

    Fig. 11. RMS wavefront error of optical antenna after optimization

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    MTF curves of optical antenna after optimization

    Fig. 12. MTF curves of optical antenna after optimization

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    • Table 1. Design requirements of optical antenna

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      Table 1. Design requirements of optical antenna

      ParameterDesign index
      Operating wavelength1550 nm
      Field of view2.5 mrad×2.5 mrad
      RMS wavefront≤λ/12@2.5 mrad×2.5 mrad and ≤λ/25@1 mrad×1 mrad
      Distance between exit pupil and mechanical face310 mm
      Magnification factor10

    • Table 2. Tolerance value of optical antenna

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      Table 2. Tolerance value of optical antenna

      MirrorConic errorRadius error /mmDecenter error /mmTilt error /(″)
      Primary mirror0.0010.1StandardStandard
      Secondary mirror0.0010.010.0210
      Fourth mirror0.0010.10.0260

    • Table 3. Tolerance analysis result of optical antenna

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      Table 3. Tolerance analysis result of optical antenna

      Probability01 mrad×1 mrad2.5 mrad×2.5 mrad
      90%0.0310.0340.082
      80%0.0290.0320.081
      50%0.0250.0280.080
      20%0.0230.0260.079
      10%0.0230.0260.079
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    Qijie Tian, Jianhua Zhang, Huanhuan Zhang, Yansong Song, Jingjing Xue, Xinrong Hu, Xiang Chen, Shuai Li. Design of Off-Axis Four-Mirror Optical Antenna with Long Exit Pupil Distance[J]. Acta Optica Sinica, 2020, 40(18): 1822001

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    Paper Information

    Category: Optical Design and Fabrication

    Received: Apr. 17, 2020

    Accepted: May. 29, 2020

    Published Online: Aug. 27, 2020

    The Author Email: Tian Qijie (tian7jie@163.com)

    DOI:10.3788/AOS202040.1822001

    Topics

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