Chinese Optics, Volume. 16, Issue 6, 1384(2023)

Design of optical system for low-sensitivity space gravitational wave telescope

Miao YU1, Jian-cong LI1, Hong-an LIN1, Yao-zhang HUANG1, Jia-xiong LUO1, Yan-xiong WU1,3、*, and Zhi WANG2,4、*
Author Affiliations
  • 1School of Physics and Optoelectronic Engineering, Foshan University, Foshan 528000, China
  • 2Changchun Institute of Optics, Fine Mechanics and Physics, Chinese Academy of Sciences, Changchun 130033, China
  • 3Jihua Laboratory, Foshan 528000, China
  • 4School of Fundamental Physics and Mathematical Sciences, Hangzhou Institute for Advanced Study, Hangzhou 310024
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    Figures & Tables(17)
    Initial structural diagram of the new telescope system
    Optimized new telescope structure
    Wavefront diagrams of different fields of view at the exit pupil
    Optimized existing telescope structure
    Wavefront error diagram of existing telescope structure
    Tolerance analysis results
    Relationships between X-eccentricities and wavefronts of the secondary mirror in the new and existing telescope structures
    Relationships between Y-eccentricities and wavefronts of the secondary mirror in the new and existing telescope structures
    • Table 1. Specifications of telescope system

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      Table 1. Specifications of telescope system

      系统参数技术指标
      光学口径/mm400
      工作波长/nm1064
      捕获视场/μrad±200
      科学视场/μrad±8
      激光束放大倍数80
      波前质量(科学视场内)λ/30(λ=1064 nm)
    • Table 2. Structural parameters of the proposed optical system

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      Table 2. Structural parameters of the proposed optical system

      结构参数取值范围取值
      α2$0,1 $0.113924050
      α3$ 0,\infty $0.060710194
      α4$0,\infty$1.820512820
      β2(− $\infty,0$−9.700000000
      β3$0,\infty$1.471698113
    • Table 3. Lens parameters of optimized optical system

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      Table 3. Lens parameters of optimized optical system

      曲率半径/mm间隔/mm圆锥系数Y向偏心/mm X轴倾斜/(°)
      主镜−1579.701−700.0−1.000−270.00.00
      次镜−200.025820.0−1.503−270.00.00
      三镜360.730−250.00.000−268.0−2.80
      四镜301.309240.10.000−288.5−1.32
    • Table 4. Wavefront errors at the exit pupil

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      Table 4. Wavefront errors at the exit pupil

      视场 /μradRMS(λ = 1064 nm) PV(λ = 1064 nm)
      (0,0)0.0063λ0.0349λ
      (0,5.6)0.0063λ0.0351λ
      (0,8.0)0.0063λ0.0352λ
      (0,−5.6)0.0063λ0.0346λ
      (0,−8.0)0.0063λ0.0345λ
      (5.6,0)0.0063λ0.0349λ
      (8.0,0)0.0063λ0.0349λ
    • Table 5. Tolerance distribution

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      Table 5. Tolerance distribution

      类型公差项主镜次镜三镜四镜
      加工公差曲率半径(mm)±0.3±0.2±0.5±0.1
      二次曲面系数±0.0001±0.0004--
      面型误差(λ=1064 nm)±λ/100 ±λ/100 ±λ/200 ±λ/200
      装调误差X向偏心(μm) -±18±18±18
      Y向偏心(μm) -±18±18±18
      Z向位移(μm) -±20±20±20
      X轴倾斜( ″) -±10±10±10
      Y轴倾斜( ″) -±10±10±10
      Z轴倾斜( ″) -±10±10±10
    • Table 6. Cumulative probability of wavefront error of the proposed telescope structure

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      Table 6. Cumulative probability of wavefront error of the proposed telescope structure

      累计概率全视场波前误差变化(λ=1064 nm)
      2%0.00683λ
      10%0.01126λ
      20%0.01478λ
      50%0.02255λ
      80%0.03235λ
      90%0.03859λ
      98%0.04824λ
    • Table 7. Cumulative probability of wavefront error in existing telescope structures

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      Table 7. Cumulative probability of wavefront error in existing telescope structures

      累计概率全视场波前误差变化(λ=1064 nm)
      2%0.00807λ
      10%0.01278λ
      20%0.01727λ
      50%0.02773λ
      80%0.04124λ
      90%0.04642λ
      98%0.05660λ
    • Table 8. The 10 most sensitive tolerance terms in new telescope structure

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      Table 8. The 10 most sensitive tolerance terms in new telescope structure

      类型反射镜面数值影响量
      Y向偏心(μm) 次镜180.03588128
      Y向偏心(μm) 次镜−180.03483910
      X向偏心(μm) 次镜180.03354102
      X向偏心(μm) 次镜−180.03354102
      二次曲面系数主镜−0.00010.01435808
      二次曲面系数主镜0.00010.01257815
      X轴倾斜( ″) 次镜100.00846399
      Y轴倾斜( ″) 次镜−100.00752685
      Y轴倾斜( ″) 次镜100.00752685
      X轴倾斜( ″) 次镜−100.00744224
    • Table 9. The 10 most sensitive tolerance terms in existing telescope structures

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      Table 9. The 10 most sensitive tolerance terms in existing telescope structures

      类型反射镜面数值影响量
      Y向偏心(μm) 次镜−180.04193880
      X向偏心(μm) 次镜180.03553085
      X向偏心(μm) 次镜−180.03553085
      Y向偏心(μm) 次镜180.03329243
      二次曲面系数主镜0.00010.01654640
      二次曲面系数主镜−0.00010.00907945
      X轴倾斜( ″) 次镜100.00695408
      曲率半径(mm)次镜0.20.00588237
      面型误差(λ=1064 nm) 主镜λ/100 0.00479811
      二次曲面系数次镜−0.00040.00368115
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    Miao YU, Jian-cong LI, Hong-an LIN, Yao-zhang HUANG, Jia-xiong LUO, Yan-xiong WU, Zhi WANG. Design of optical system for low-sensitivity space gravitational wave telescope[J]. Chinese Optics, 2023, 16(6): 1384

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    Paper Information

    Category: Original Article

    Received: Jan. 9, 2023

    Accepted: Mar. 21, 2023

    Published Online: Nov. 29, 2023

    The Author Email:

    DOI:10.37188/CO.2023-0006

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