Infrared and Laser Engineering, Volume. 52, Issue 3, 20220417(2023)

Analysis of distributed detection range changes caused by infrared system self-thermal radiation

Baoku Li1,2, Le Liu1,2, Wei Xu1, Wenbin Zeng1, Haifei Hu1, Feng Yan1, and Sheng Cai1、*
Author Affiliations
  • 1Changchun Institute of Optics, Fine Mechanics and Physics, Chinese Academy of Sciences, Changchun 130033, China
  • 2University of Chinese Academy of Sciences, Beijing 100049, China
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    Figures & Tables(14)
    Distributed detection range analysis method
    (a) Uniform partitions with irradiance greater than 0 in each region; (b) Nonuniform partitions with the same irradiance in each region
    Structure diagram of infrared optical system
    MTF curve of infrared optical system
    Structure diagram of infrared optomechanical system
    Variation of detection distance with image surface irradiance
    Regional distribution map of detector focal plane irradiance at 293.15 K
    Distributed detection distance at 293.15 K
    Main influence surfaces corresponding to different regions
    Comparison of detection distances in each area before and after low temperature treatment of lens7
    Comparison of detection distances of each area before and after low temperature treatment of lens3
    • Table 1. Main factors affecting the zoning principle

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      Table 1. Main factors affecting the zoning principle

      Zoning principle main influencing factors
      Irradiance distributionIrradiance densityIrradiance intensity
      System noiseTarget temperatureTarget dispersion size
    • Table 2. Proportion of irradiance in different regions of the detector focal plane

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      Table 2. Proportion of irradiance in different regions of the detector focal plane

      Operating temperature/K233.15243.15253.15263.15273.15283.15293.15303.15313.15
      (1,1)0.08730.06730.07450.09980.10790.08530.05390.04320.0372
      (1,2)0.03460.01860.02120.02800.05430.04340.12260.10540.0900
      (1,3)0.06740.04760.04940.04300.04520.03200.02640.04480.0159
      (1,4)0.01490.02280.04630.03140.04010.04160.03570.12730.0995
      (2,1)0.07340.15020.05620.03530.03230.08880.06120.06050.0312
      (2,2)0.38460.24750.28540.27430.18020.13740.10510.02300.0470
      (2,3)0.00040.01950.02630.03820.03560.09170.07550.06840.0859
      (2,4)0.05300.13540.03710.02560.03520.04440.03620.06150.0364
      (3,1)0.05340.03400.04450.03810.02840.02600.06070.04440.0407
      (3,2)0.00530.01180.02260.01640.03650.03470.03600.04230.0376
      (3,3)0.03690.07780.09670.12150.10810.08800.07680.04990.0473
      (3,4)0.02070.01450.03430.02530.02460.01870.01130.01850.0266
      (4,1)0.00050.00700.02390.02310.04520.06140.06480.08120.1189
      (4,2)0.06090.06100.06230.03380.02570.02240.03480.02920.0268
      (4,3)0.05070.03090.04720.03240.04420.03540.02780.03120.0473
      (4,4)0.00180.01940.02070.02430.02560.03440.03380.02910.0464
      (5,1)0.00070.00080.00700.00510.01020.00780.01000.01570.0434
      (5,2)0.00290.00150.00260.04230.04970.04430.04760.05230.0467
      (5,3)0.04650.02960.03640.02980.03630.03290.05310.04770.0492
      (5,4)0.00420.00290.00540.03220.03460.02940.02680.02460.0260
    • Table 3. Statistical results of the influence weight of each component's own thermal radiation on different region

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      Table 3. Statistical results of the influence weight of each component's own thermal radiation on different region

      Lens1 surface Lens2 surface Lens3 surface Lens4 surface Lens5 surface Lens6 surface Lens7 surface Tube2 surface Tube3 surface Tube4 surface
      (1,1)0.01090.45630.58290.28840.21530.45920.38102.84780.01883.7397
      (1,2)0.07980.97700.04153.88610.78630.15200.99540.98951.07810.0143
      (1,3)0.06300.05070.31530.37760.07101.12612.57660.05874.23370.1275
      (1,4)1.14840.00050.75660.75541.43931.53273.28290.00100.00040.0829
      (2,1)0.47400.00605.69410.59650.52110.00180.63390.11940.00240.9508
      (2,2)5.88130.00630.00590.53060.53770.92150.62690.04740.17180.2708
      (2,3)0.06312.22683.92990.35630.57340.05951.55990.03890.00770.1845
      (2,4)0.02780.06640.00722.26973.99570.00521.82960.04660.70690.0447
      (3,1)0.01110.00002.19200.58861.69660.00110.65823.18480.00070.6668
      (3,2)0.02740.00240.89750.95691.06950.67713.51160.00001.85230.0054
      (3,3)0.03960.10570.88850.04810.66574.12180.39690.30680.00892.4179
      (3,4)0.04700.01120.15663.07580.47702.92921.57950.64740.05040.0259
      (4,1)1.32080.00000.35382.21302.40220.94291.45450.00080.00110.3109
      (4,2)0.00550.00550.01671.09001.63080.00253.48950.00002.25630.5032
      (4,3)0.03550.09740.06582.87463.42240.03941.05591.36830.00050.0402
      (4,4)0.08690.10254.14750.14441.30280.50092.11550.00000.34360.2559
      (5,1)0.58440.05040.12191.84781.82030.29283.76810.00000.36630.1481
      (5,2)0.58760.00010.04210.84981.38150.55152.91600.00002.66580.0056
      (5,3)0.01050.00022.28070.73911.73320.07640.55623.06920.36400.1705
      (5,4)0.08390.29772.88630.32450.34050.00604.26910.74840.00580.0377
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    Baoku Li, Le Liu, Wei Xu, Wenbin Zeng, Haifei Hu, Feng Yan, Sheng Cai. Analysis of distributed detection range changes caused by infrared system self-thermal radiation[J]. Infrared and Laser Engineering, 2023, 52(3): 20220417

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    Paper Information

    Category: Infrared technology and application

    Received: Aug. 1, 2022

    Accepted: --

    Published Online: Apr. 12, 2023

    The Author Email: Cai Sheng (caisheng@ciomp.ac.cn)

    DOI:10.3788/IRLA20220417

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