• Opto-Electronic Engineering
  • Vol. 50, Issue 4, 220225 (2023)
Jian Yuan1、2, Lei Zhang1、*, Qifu Jiang1, Siyu Pei1, and Xiaoxue Gong1、2
Author Affiliations
  • 1Chang Guang Satellite Technology Co., LTD, Changchun, Jilin 130033, China
  • 2School of Mechanical Engineering and Automation, Northeastern University, Shenyang, Liaoning 110819, China
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    DOI: 10.12086/oee.2023.220225 Cite this Article
    Jian Yuan, Lei Zhang, Qifu Jiang, Siyu Pei, Xiaoxue Gong. Structure design of 1.2 m high lightweight primary mirror blank[J]. Opto-Electronic Engineering, 2023, 50(4): 220225 Copy Citation Text show less
    Optical path of the coaxial three mirror camera
    Fig. 1. Optical path of the coaxial three mirror camera
    Structure form of the primary mirror
    Fig. 2. Structure form of the primary mirror
    Layout of distributed datums on the mirror blank
    Fig. 3. Layout of distributed datums on the mirror blank
    Measures for th higher lightweight mirror
    Fig. 4. Measures for th higher lightweight mirror
    Print-through effective of the primary mirror under polishing
    Fig. 5. Print-through effective of the primary mirror under polishing
    Parametric modeling of the primary mirror blank
    Fig. 6. Parametric modeling of the primary mirror blank
    Iteration of optimization process for the primary mirror blank
    Fig. 7. Iteration of optimization process for the primary mirror blank
    Mechanical properties of the primary mirror blank. (a) Gravitational deformation nephogram; (b) The 1st order free vibration mode
    Fig. 8. Mechanical properties of the primary mirror blank. (a) Gravitational deformation nephogram; (b) The 1st order free vibration mode
    Manufacturing results of the primary mirror blank. (a) Mirror blank; (b) Centroid position test
    Fig. 9. Manufacturing results of the primary mirror blank. (a) Mirror blank; (b) Centroid position test
    Optical processing of the primary mirror. (a) Polishing with the robot arm; (b) Interferogram
    Fig. 10. Optical processing of the primary mirror. (a) Polishing with the robot arm; (b) Interferogram
    PropertyRB-SiCBerylliumULEZerodur
    Density ρ/(kg·m−3)3050185022102530
    Elastic modulus E/GPa3402876791
    Poisson ratio μ0.20.080.170.24
    Thermal conductivity λ/(W·K−1·m−1)1552161.311.64
    Thermal expansion coefficient α/(10−6·K−1)2.5011.40.030.05
    Specific stiffness E/ρ111.515530.336
    Thermal stability λ/α6218.943.732.8
    Comprehensive performance (E/ρ)·(λ/α)6913293913241180
    Table 1. Physical properties of main materials for the large aperture mirror
    No.ParameterLimitsOriginalOptimalUltimate
    1Face thickness/T1[4, 8]64.2824
    2Bottom thickness/T2[3, 6]54.4194
    3Cone thickness/C1[6, 12]108.15410
    4Main-stiffener thickness/R1[3, 6]54.1434
    5Sub-stiffener thickness/R2[3, 6]53.2463
    6Outer wall thickness/O1[3, 6]53.4403
    7Central window thickness/O2[3, 6]53.2223
    8Peripheral thickness/R3[3, 6]53.2033
    9Blank height/H1[125, 150]130146.660142.5
    10Trimmed height/H2[100, 125]100115.325125
    Table 2. Parameter ranges and optimization results (unit: mm)
    Jian Yuan, Lei Zhang, Qifu Jiang, Siyu Pei, Xiaoxue Gong. Structure design of 1.2 m high lightweight primary mirror blank[J]. Opto-Electronic Engineering, 2023, 50(4): 220225
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