Infrared and Laser Engineering, Volume. 50, Issue 10, 20210476(2021)

Design of support structure for space optical payloads with refocusing function (Invited)

Shanshan Cong... Sheng Wang, Meijiao Sun, Zhipeng Xue, Fan Yang, Yu Wang, Maosheng Chen* and Lei Zhang |Show fewer author(s)
Author Affiliations
  • Chang Guang Satellite Technology Co., LTD., Changchun 130000, China
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    Figures & Tables(15)
    Zemax model of optical system
    Curve of volume fraction and iterations
    Result of topology optimization design
    1st modal shape of support structure
    Supporting structure with thermal system
    Schematic diagram of thermal optical test device
    Procedure for thermal optical test
    System of thermal optical test
    Curve of thermal refocussing
    • Table 1. Thermal refocusing range of different materials for support structure of space optical payloads

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      Table 1. Thermal refocusing range of different materials for support structure of space optical payloads

      MaterialSpecific stiffnessThermal expansion coefficient Focusing range /mm
      TC425.99.1/10−6K−19.1×10−5βL0
      SiCp/Al61.28/10−6K−18×10−5βL0
      Invar17.40.54/10−6K−15.4×10−6βL0
      M4042.300
    • Table 2. Static analysis results

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      Table 2. Static analysis results

      MirrorEccentricTilt
      ΔX/μm ΔY/μm ΔZ/μm θX/(″) θY/(″) θZ/(″)
      Primary mirrorDatumDatumDatumDatumDatumDatum
      Second mirror4.60.02-0.023.9-
    • Table 3. Analysis results of temperature inhomogeneity

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      Table 3. Analysis results of temperature inhomogeneity

      ±0.2 ℃EccentricTilt
      ΔX/μm ΔY/μm ΔZ/μm θX/(″) θY/(″) θZ/(″)
      Second mirror−0.001 51.838 10.519−1.971 30.028 5None
    • Table 4. Calculation results of support structure temperature change and focal position change

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      Table 4. Calculation results of support structure temperature change and focal position change

      Support structure temperature change/℃54321
      Focal position change/mm0.3820.3110.2340.1570.079
    • Table 5. Measuring result of thermal optical test

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      Table 5. Measuring result of thermal optical test

      T/℃ $ \sigma ' $/mm $ \sigma '' $/mm MTF
      23−2.05−0.341 809 0280.085 8
      22−1.43−0.238 432 6390.080 9
      21−1.25−0.208 420 1390.083 2
      20.5−1.02−0.170 070 8330.081 6
      20−0.69−0.115 047 9170.080 8
      19.5−0.4−0.066 694 4440.083 3
      170.540.090 037 50.081 9
    • Table 6. Thermal refocussing test in orbit

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      Table 6. Thermal refocussing test in orbit

      NumberTemperature of supporting structure/℃Dynamic MTF
      119.40.044 2
      218.40.043 6
      320.00.058 8
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    Shanshan Cong, Sheng Wang, Meijiao Sun, Zhipeng Xue, Fan Yang, Yu Wang, Maosheng Chen, Lei Zhang. Design of support structure for space optical payloads with refocusing function (Invited)[J]. Infrared and Laser Engineering, 2021, 50(10): 20210476

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    Paper Information

    Category: Special issue—Advanced design and manufacturing of optical system

    Received: Jul. 13, 2021

    Accepted: --

    Published Online: Dec. 7, 2021

    The Author Email: Chen Maosheng (chenms0911@aliyun.com)

    DOI:10.3788/IRLA20210476

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