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Acta Optica Sinica, Volume. 40, Issue 20, 2022001(2020)

Design of Main Mirror for Splicing Curvature Error Adjusting Based on Approximate Optimization

Songhang Wu1,2、*, Jihong Dong1、**, Shuyan Xu1, and Boqian Xu1
Author Affiliations
  • 1Changchun Institute of Optics, Fine Mechanics and Physics, Chinese Academy of Sciences, Changchun, Jilin 130033, China
  • 2University of Chinese Academy of Sciences, Beijing 100049, China
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    AbstractGet PDF(in Chinese)
    Figures&Tables (11)
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    References (7)
    Cited By (1)
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    Figures & Tables(11)
    Diagram of Latin hypercube sampling

    Fig. 1. Diagram of Latin hypercube sampling

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    Structure of RBF neural network

    Fig. 2. Structure of RBF neural network

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    Approximate optimization algorithm

    Fig. 3. Approximate optimization algorithm

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    Back of the JWST sub-mirror [7]

    Fig. 4. Back of the JWST sub-mirror [7]

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    Optimization design process of curvature error adjustment mechanism

    Fig. 5. Optimization design process of curvature error adjustment mechanism

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    Diagram of optimization parameters

    Fig. 6. Diagram of optimization parameters

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    Optimized design process of sub-mirror

    Fig. 7. Optimized design process of sub-mirror

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    Approximation process of the model. (a) Curvature; (b) RMS; (c) first-order natural frequency

    Fig. 8. Approximation process of the model. (a) Curvature; (b) RMS; (c) first-order natural frequency

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    Process of optimization iteration. (a) Simulation model; (b) approximate model

    Fig. 9. Process of optimization iteration. (a) Simulation model; (b) approximate model

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    • Table 1. Material properties

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      Table 1. Material properties

      MaterialDensity /(10-6 kg·mm-3)E /(105 MPa)CTE /(10-6 K-1)ν
      Zerodur2.540.910.10.24
      Epoxy resin adhesive1.227.5049.00.43
      TC44.401.099.10.34

    • Table 2. Designed variables and optimized results unit: mm

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      Table 2. Designed variables and optimized results unit: mm

      VariableInitial valueOptimization result
      tH53.03
      D11510.8
      D289.5
      L8073.6
      H52.85
      l1516.9
      h52.85
      t154.5
      t251.6
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    Songhang Wu, Jihong Dong, Shuyan Xu, Boqian Xu. Design of Main Mirror for Splicing Curvature Error Adjusting Based on Approximate Optimization[J]. Acta Optica Sinica, 2020, 40(20): 2022001

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    Paper Information

    Category: Optical Design and Fabrication

    Received: May. 9, 2020

    Accepted: Jul. 3, 2020

    Published Online: Sep. 19, 2020

    The Author Email: Wu Songhang (wusonghang1994@163.com), Dong Jihong (dongjihong2002@sohu.com)

    DOI:10.3788/AOS202040.2022001

    Topics

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