Infrared and Laser Engineering, Volume. 54, Issue 2, 20240511(2025)

Large-aperture high dynamic infrared radiation measurement technology based on system thermal radiation differential

Sujun LI1,2,3, Mu GU1,2,3, Xiang PENG1,2,3, Xuefeng LAI1,2,3, and Jinmei ZHOU1,2,3
Author Affiliations
  • 1Key Laboratory of Science and Technology on Space Optoelectronic Precision Measurement, Chinese Academy of Sciences, Chengdu 610209, China
  • 2National Laboratory on Adaptive Optics, Chengdu 610209, China
  • 3China Institute of Optics and Electronics, Chinese Academy of Sciences, Chengdu 610209, China
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    Figures & Tables(14)
    Distributed reference cascade calibration schematic
    Schematic diagram of system stray radiation transfer
    Temperature change of part key structural parts during external calibration
    System response fitting results of different calibration points
    Whole system calibration coefficient and external calibration coefficient precision comparison
    Thermal radiation difference before and after fitting results of external calibration data
    Thermal radiation differential before and affter calibration accuracy
    Optical path diagram of high dynamic calibration accuracy test
    Radiation measurement test scenes at different ambient temperatures
    Measurement error of conventional model under different temperature difference
    Model measurement error under different temperature differences
    Infrared star image
    • Table 1. Calibration accuracy of textual model based on collimator

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      Table 1. Calibration accuracy of textual model based on collimator

      Attenuator transmittanceBlack-body temperature/℃Calibration relative error
      100%751.49%
      100%1251.01%
      100%2500.91%
      10%4501.35%
      10%6000.87%
      10%7001.20%
      10%9000.77%
    • Table 2. Comparison of star measurement error

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      Table 2. Comparison of star measurement error

      Infrared starIllumination(theoretical)/W·cm-2Relative error(conventional model)Relative error(textual model)
      SAO1009446.46×10−1448.34%3.53%
      SAO987696.99×10−1452.62%4.81%
      SAO781351.66×10−1483.27%5.43%
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    Sujun LI, Mu GU, Xiang PENG, Xuefeng LAI, Jinmei ZHOU. Large-aperture high dynamic infrared radiation measurement technology based on system thermal radiation differential[J]. Infrared and Laser Engineering, 2025, 54(2): 20240511

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    Paper Information

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    Received: Nov. 5, 2024

    Accepted: --

    Published Online: Mar. 14, 2025

    The Author Email:

    DOI:10.3788/IRLA20240511

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