Infrared and Laser Engineering, Volume. 49, Issue 4, 0414004(2020)

Analysis of absorption characteristics of polluted particles on optical mirrors

Xiang Wang1, Kepeng Zhang2, Zhuang Chen1, Bin Zhang1、*, Jian Chen3, and Jianhua Zhao3
Author Affiliations
  • 1College of Electronics and Information Engineering, Sichuan University, Chengdu 610064, China
  • 2Institute of Photoelectric Technology, Chinese Academy of Sciences, Chengdu 610209, China
  • 3Anhui Province Key Laboratory of Non-Destructive Evaluation, Hefei 230031, China
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    Figures & Tables(13)
    Light absorption model for contaminated particles
    Internal electric field strength of contaminated particles with different sizes
    Absorption of polluted particles with different refractive index (a) real part and (b) virtual part
    Distribution of polluted particles on optical mirrors with different cleanliness
    Ratio of absorptive value of particles of different sizes to total absorptive value of particles in different cleanliness
    Ratio of absorptive value of specular dust to total dust collection at different wavelengths
    Ratio of polluted particle absorption to total absorption of specular particle with different refractive index
    Effects of air cleanliness on specular particulate pollutant absorption
    Influence of orientation of different working faces on absorption
    • Table 1. Refractive index of dust at different wavelengths

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      Table 1. Refractive index of dust at different wavelengths

      ItemValue
      λ/μm 0.3250.6331.153.3910.6
      n1.53+0.01i1.53+0.000 5i1.5+0.001i1.5+0.02i1.7+0.2i
    • Table 2. Absorption efficiency of different air cleanliness grades

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      Table 2. Absorption efficiency of different air cleanliness grades

      Air class1 00010 000100 000
      Absorption(0.633 μm)2.80×10−81.92×10−71.31×10−6
      Absorption (1.15 μm)3.46×10−82.37×10−71.62×10−6
    • Table 3. Absorption efficient for different placement

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      Table 3. Absorption efficient for different placement

      PlacementHorizontal downward surfaceVerticle surfaceHorizontal upward surface
      Absorption (0.633 μm) 1.94×10−102.33×10−92.80×10−8
      Absorption (1.15 μm) 2.39×10−102.88×10−93.46×10−8
    • Table 4. Absorption efficiency at exposure times

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      Table 4. Absorption efficiency at exposure times

      Exposure time1 d10 d20 d
      Absorption(0.633 μm)2.80×10−83.37×10−77.13×10−7
      Absorption(1.15 μm)3.46×10−84.16×10−78.80×10−7
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    Xiang Wang, Kepeng Zhang, Zhuang Chen, Bin Zhang, Jian Chen, Jianhua Zhao. Analysis of absorption characteristics of polluted particles on optical mirrors[J]. Infrared and Laser Engineering, 2020, 49(4): 0414004

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    Paper Information

    Received: Jan. 6, 2020

    Accepted: --

    Published Online: May. 27, 2020

    The Author Email: Zhang Bin (zhangbinff@sohu.com)

    DOI:10.3788/IRLA202049.0414004

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