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Chinese Journal of Lasers, Volume. 49, Issue 17, 1704005(2022)

Design and Mechanical and Thermal Properties of Spaceborne Liquid Crystal Tester

Wei Huang1,2,3, Junfeng Hou1,2,3、*, Jiaben Lin1,2,3, Yang Zhang1,2,3, Yuanyong Deng1,2,3, and Haifeng Wang4
Author Affiliations
  • 1National Astronomical Observatories, Chinese Academy of Sciences, Beijing 100101, China
  • 2Key Laboratory of Solar Activity, Chinese Academy of Sciences, Beijing 100101, China
  • 3University of Chinese Academy of Sciences, Beijing 100049, China
  • 4Institute of Fluid Physics, China Academy of Engineering Physics, Mianyang 621999, Sichuan, China
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    AbstractGet PDF(in Chinese)
    Figures&Tables (13)
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    References (23)
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    Figures & Tables(13)
    Structure and principle of liquid crystal variable retarder (LCVR). (a) Driving voltage V＝0 V; (b) driving voltage V＝10 V

    Fig. 1. Structure and principle of liquid crystal variable retarder (LCVR). (a) Driving voltage V＝0 V; (b) driving voltage V＝10 V

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    Schematic of optical path

    Fig. 2. Schematic of optical path

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    Photoelectric curve of LCVR. (a) Normalized intensity-voltage curve; (b) phase retardation-voltage curve

    Fig. 3. Photoelectric curve of LCVR. (a) Normalized intensity-voltage curve; (b) phase retardation-voltage curve

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    Flight phase of liquid crystal tester. (a) Internal structure; (b) printed circuit board

    Fig. 4. Flight phase of liquid crystal tester. (a) Internal structure; (b) printed circuit board

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    Working block diagram of liquid crystal tester

    Fig. 5. Working block diagram of liquid crystal tester

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    On-orbit workflow diagram of liquid crystal tester

    Fig. 6. On-orbit workflow diagram of liquid crystal tester

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    Data before and after mechanical test. (a) Normalized intensity-voltage curve; (b) phase retardation-voltage curve

    Fig. 7. Data before and after mechanical test. (a) Normalized intensity-voltage curve; (b) phase retardation-voltage curve

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    Whole curves of thermal tests. (a) Thermal shock test; (b) thermal cycle test; (c) thermal vacuum test

    Fig. 8. Whole curves of thermal tests. (a) Thermal shock test; (b) thermal cycle test; (c) thermal vacuum test

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    Repeatability of normalized intensity and phase retardation in high or low thermal test. (a)(b) Thermal shock test; (c)(d) thermal cycle test; (e)(f) thermal vacuum test

    Fig. 9. Repeatability of normalized intensity and phase retardation in high or low thermal test. (a)(b) Thermal shock test; (c)(d) thermal cycle test; (e)(f) thermal vacuum test

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    Data calibration in thermal test. (a) Difference of phase retardation between high and low temperatures in thermal cycle test; (b) difference of phase retardation between high and low temperatures in thermal vacuum test; (c)－(f) comparison between predicted and actual phase retardation-voltage curves when ambient temperature is －10, 0, 10 and 20 ℃

    Fig. 10. Data calibration in thermal test. (a) Difference of phase retardation between high and low temperatures in thermal cycle test; (b) difference of phase retardation between high and low temperatures in thermal vacuum test; (c)－(f) comparison between predicted and actual phase retardation-voltage curves when ambient temperature is －10, 0, 10 and 20 ℃

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    Variations of normalized intensity and phase retardation with time under long period monitoring

    Fig. 11. Variations of normalized intensity and phase retardation with time under long period monitoring

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    • Table 1. Mechanical test conditions

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      Table 1. Mechanical test conditions

      TypePower spectral densityDirectionDuration
      Random vibration /Hz20－1003 dB·oct－1X, Y, Z4－5 min
      100－6000.04 g2·Hz－1
      600－2000－6 dB·oct－1
      Sine vibration /Hz5－822 mmX，Y，Z5 min
      8－307 g
      30－6016 g
      60－10015 g
      Mechanic impact /Hz100－50012 dB·oct－1X，Y，Z2 times
      500－50001000 g

    • Table 2. Thermal test conditions

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      Table 2. Thermal test conditions

      Types of thermal testAtmospheric pressure /PaTemperature range /℃Temperature-rise rate /(℃·min－1)High or low temperature stay time /hCycles
      Thermal shock1.0－30－＋505218
      Thermal cycle1.0－25－＋25368
      Thermal vacuum<1.3×10－3－25－＋25>163.5
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    Wei Huang, Junfeng Hou, Jiaben Lin, Yang Zhang, Yuanyong Deng, Haifeng Wang. Design and Mechanical and Thermal Properties of Spaceborne Liquid Crystal Tester[J]. Chinese Journal of Lasers, 2022, 49(17): 1704005

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    Paper Information

    Category: Measurement and metrology

    Received: Dec. 10, 2021

    Accepted: Jan. 7, 2022

    Published Online: Jul. 28, 2022

    The Author Email: Hou Junfeng (jfhou@bao.ac.cn)

    DOI:10.3788/CJL202249.1704005

    Topics

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