Chinese Optics, Volume. 18, Issue 3, 460(2025)

Optimized design of single-axis supported SiC mirror with aperture of 460 mm

Tao WANG1, Xiang-yang WANG2, Xin-yu ZHAO1, Rui-qi LIU1, and Yong-gang CAO1、*
Author Affiliations
  • 1Changchun Institute of Optics, Fine Mechanics and Physics, Chinese Academy of Sciences, Changchun 130033, China
  • 2PLA 63861 Army, Baicheng 137000, China
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    Figures & Tables(10)
    Support method for mirror
    Optimized design variables
    Simulation calculation results of surface shape of the mirror at 0°
    Simulation calculation results of surface shape of the mirror at 45°
    Simulation calculation results of the surface shape of the mirror with a temperature difference of 10 °C
    Mirror with 460 mm aperture
    Mirror interferogram inspection
    • Table 1. Properties of mirror’s materials commonly used

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      Table 1. Properties of mirror’s materials commonly used

      ρ(g/cm3)E(GPa)υα(10−6/K)K(W/m•K)E/ρ(GPa•cm3/g)
      Zerodur2.53930.240.011.4636.8
      ULE2.21670.170.0151.330.3
      Fused silica2.0274.60.1670.5636.9
      SiC2.73900.142.4185111.8
      K92.5281.30.257.81.20732.1
      Be1.852800.2511.4160151
    • Table 2. Analysis of SiC mirror characteristics

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      Table 2. Analysis of SiC mirror characteristics

      优点缺点
      重量合理设计结构形式和先进的烧结工艺,可达到较高的轻量化程度。
      弹性模量高弹性模量使得同等应力作用下,材料的弹性变形更小。刚度高导致加工难度大、增加加工成本。
      热膨胀系数可选择热膨胀系数接近的金属材料作为支撑,降低环境温度变化导致的局部应力。热膨胀会导致镜面曲率半径变化,可通过温度调焦解决。
      导热率高导热率可缩短热平衡时间,降低环境温度变化导致的局部应力。
    • Table 3. Optimized design results (mm)

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      Table 3. Optimized design results (mm)

      设计变量初始值优化值
      A810.24
      B85.9
      C56.1
      D1513.9
      E64.42
      F65.84
      G86.42
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    Tao WANG, Xiang-yang WANG, Xin-yu ZHAO, Rui-qi LIU, Yong-gang CAO. Optimized design of single-axis supported SiC mirror with aperture of 460 mm[J]. Chinese Optics, 2025, 18(3): 460

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    Paper Information

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    Received: Nov. 22, 2024

    Accepted: --

    Published Online: Jun. 16, 2025

    The Author Email:

    DOI:10.37188/CO.2024-0172

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