Acta Optica Sinica, Volume. 45, Issue 3, 0312002(2025)

External Field Measurement Method of Target Infrared Radiance with Environmental Temperature Correction

Shiqi Gan*... Weichao Wang, Guangfu Yuan, Xiao Zhang, Xin Ma and Hetao Qin |Show fewer author(s)
Author Affiliations
  • 95859 Unit of PLA, Jiuquan 735018, Gansu , China
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    Figures & Tables(10)
    Schematic of external field calibration method of target infrared radiation characteristics. (a) Traditional calibration method; (b) calibration method considering ambient temperature
    Schematic of external field measurement of target infrared radiation characteristics. (a) Traditional calibration method; (b) proposed method
    Flow chart of the proposed method
    Contrast of average relative error between traditional and proposed methods
    Schematic of external field verification experiment
    Experimental scenarios and data
    • Table 1. Raw data in the calibration experiment

      View table

      Table 1. Raw data in the calibration experiment

      Blackbody temperature /℃Theoretical radiance /Wm-2sr-1Ambient temperature /℃Pixel point (411, 201) grayAverage gray
      750.32985.533213317.80
      1000.64995.342184215.92
      1251.17644.656015602.05
      1501.98544.178687874.31
      1753.16073.81108511099.60
    • Table 2. Calibration results

      View table

      Table 2. Calibration results

      ItemTraditional methodCalibration method considering ambient temperature
      GBG'KD
      Pixel point (411, 201)2747.732399.102777.1042627.691252.93
      Average2754.072393.242784.9344797.541188.73
    • Table 3. Verification experiment data

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      Table 3. Verification experiment data

      Blackbody temperature /℃Ambient temperature /℃

      Path radiance /

      10-3 Wm-2sr-1

      Transmittance(411, 201) grayAverage gray
      7017.50.49820.982638963894.42
      9017.10.45630.982844024401.41
    • Table 4. Comparison of calculation results between two direct calculation methods and proposed method

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      Table 4. Comparison of calculation results between two direct calculation methods and proposed method

      Pixel point

      Target blackbody temperature /

      Reference

      blackbody temperature /

      Theoretical radiance /

      Wm-2sr-1

      Traditional methodMethod considering ambient temperatureProposed method

      Calculated radiance /

      Wm-2sr-1

      Relative error /%

      Calculated radiance /

      Wm-2sr-1

      Relative error /%

      Calculated radiance /

      Wm-2sr-1

      Relative

      error /%

      (411, 201)70900.28450.5537-0.25918.920.30477.09
      (411, 201)90700.50100.722644.210.45638.930.48143.91
      (397, 187)70900.28450.5563-0.28260.660.30838.38
      (397, 187)90700.50100.721844.060.47585.030.47784.64
      (426, 216)70900.28450.5526-0.245413.740.29824.82
      (426, 216)90700.50100.727945.270.449110.360.48782.64
      Average70900.28450.5539-0.245315.180.29318.59
      90700.50100.722844.260.442811.860.46927.22
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    Shiqi Gan, Weichao Wang, Guangfu Yuan, Xiao Zhang, Xin Ma, Hetao Qin. External Field Measurement Method of Target Infrared Radiance with Environmental Temperature Correction[J]. Acta Optica Sinica, 2025, 45(3): 0312002

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    Paper Information

    Category: Instrumentation, Measurement and Metrology

    Received: Jul. 22, 2024

    Accepted: Nov. 24, 2024

    Published Online: Feb. 21, 2025

    The Author Email: Gan Shiqi (gsq1342@163.com)

    DOI:10.3788/AOS241325

    CSTR:32393.14.AOS241325

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