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Infrared and Laser Engineering, Volume. 50, Issue 6, 20210041(2021)

Effect of ambient humidity on scattering characteristics of optical mirror surface

Zhuang Chen... Boyu Tian, Lin Miao, Nianchun Sun and Bin Zhang |Show fewer author(s)
Author Affiliations
  • College of Electronics and Information Engineering, Sichuan University, Chengdu 610065, China
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    AbstractGet PDF(in Chinese)
    Figures&Tables (7)
    Equations (20)
    References (15)
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    Figures & Tables(7)
    Particle distribution with different surface cleanliness in the mirror surface

    Fig. 1. Particle distribution with different surface cleanliness in the mirror surface

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    Comparison curve of (NH4)2SO4 particle scattering growth factor with environmental relative humidity

    Fig. 2. Comparison curve of (NH4)2SO4 particle scattering growth factor with environmental relative humidity

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    Scattering efficiency factorQsca of polluted particles of different particle size varies with humidity

    Fig. 3. Scattering efficiency factorQsca of polluted particles of different particle size varies with humidity

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    Variation of BRDF with incident angle under different conditions (λ=0.55 μm)

    Fig. 4. Variation of BRDF with incident angle under different conditions (λ=0.55 μm)

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    • Table 1. TIS for surfaces with different proportions of hydrophilic particles (λ=0.55 μm G1=300)

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      Table 1. TIS for surfaces with different proportions of hydrophilic particles (λ=0.55 μm G1=300)

      Humidity00.30.60.9
      TIS(A:30%)7.01×10−57.14×10−57.54×10−51.85×10−4
      TIS(A:40%)7.01×10−57.18×10−57.72×10−52.23×10−4
      TIS(A:50%)7.01×10−57.23×10−57.90×10−52.61×10−4
      TIS(A:60%)7.01×10−57.27×10−58.08×10−52.99×10−4
      TIS(A:70%)7.01×10−57.32×10−58.25×10−53.37×10−4
      TIS(A:80%)7.01×10−57.37×10−58.43×10−53.76×10−4

    • Table 2. TIS for different mirror cleanliness levels (λ=0.55 μm)

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      Table 2. TIS for different mirror cleanliness levels (λ=0.55 μm)

      Mirror class300500700
      TIS(XRH=0) 7.01×10−58.10×10−44.56×10−3
      TIS(XRH=0.3) 7.27×10−58.63×10−44.73×10−3
      TIS(XRH=0.6) 8.08×10−51.02×10−35.26×10−3
      TIS(XRH=0.9) 2.99×10−45.23×10−31.95×10−2

    • Table 3. TIS at different angles of incidence (λ=0.55 μm G1=300)

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      Table 3. TIS at different angles of incidence (λ=0.55 μm G1=300)

      Humidity00.30.60.9
      TIS(0°)7.02×10−57.62×10−58.97×10−53.71×10−4
      TIS(5°)7.02×10−57.61×10−58.97×10−53.71×10−4
      TIS(10°)7.02×10−57.61×10−58.96×10−53.71×10−4
      TIS(15°)7.01×10−57.61×10−58.96×10−53.71×10−4
      TIS(30°)6.99×10−57.59×10−58.93×10−53.70×10−4
      TIS(50°)6.95×10−57.54×10−58.89×10−53.70×10−4
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    Zhuang Chen, Boyu Tian, Lin Miao, Nianchun Sun, Bin Zhang. Effect of ambient humidity on scattering characteristics of optical mirror surface[J]. Infrared and Laser Engineering, 2021, 50(6): 20210041

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    Paper Information

    Category: Optical design

    Received: Jan. 22, 2021

    Accepted: --

    Published Online: Aug. 19, 2021

    The Author Email:

    DOI:10.3788/IRLA20210041

    Topics

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