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Laser & Optoelectronics Progress, Volume. 60, Issue 10, 1030001(2023)

Stray-Light Suppression of Far Ultraviolet Ionization Layer Hyperspectral Imager

Yanfang Ju1,2, Guochao Gu1, Bo Li1、*, Guanyu Lin1,4, Zhengzheng Ma3, and Bin Xu3
Author Affiliations
  • 1Changchun Institute of Optics, Fine Mechanics and Physics, Chinese Academy of Sciences, Changchun 130033, Jilin, China
  • 2University of Chinese Academy of Sciences, Beijing 100049, China
  • 3The 22nd Research Institute, China Electronics Technology Group Corporation, Qingdao 266107, Shandong, China
  • 4Innovation Center for FengYun Meteorological Satellite, Beijing 100081, China
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    AbstractGet PDF(in Chinese)
    Figures&Tables (19)
    Equations (6)
    References (16)
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    Paper Information
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    Figures & Tables(19)
    Observation diagram

    Fig. 1. Observation diagram

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    Optical system structure diagram

    Fig. 2. Optical system structure diagram

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    Schematic of mechanical structure

    Fig. 3. Schematic of mechanical structure

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    Three-dimensional model of the system

    Fig. 4. Three-dimensional model of the system

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    Geometric diagram of bidirectional scattering distribution function

    Fig. 5. Geometric diagram of bidirectional scattering distribution function

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    Schematic of energy transmission between micro panels

    Fig. 6. Schematic of energy transmission between micro panels

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    Light source spectral weight

    Fig. 7. Light source spectral weight

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    Ray tracing diagram (before inhibition)

    Fig. 8. Ray tracing diagram (before inhibition)

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    Ray tracing diagram (after inhibition)

    Fig. 9. Ray tracing diagram (after inhibition)

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    Energy distribution diagram (before inhibition)

    Fig. 10. Energy distribution diagram (before inhibition)

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    Energy distribution diagram (after inhibition)

    Fig. 11. Energy distribution diagram (after inhibition)

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    Image plane energy of each field of view

    Fig. 12. Image plane energy of each field of view

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    Diffraction order energy of the grating

    Fig. 13. Diffraction order energy of the grating

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    Noncentral wavelength energy distribution

    Fig. 14. Noncentral wavelength energy distribution

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    Full band energy distribution

    Fig. 15. Full band energy distribution

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    • Table 1. Technical indicators

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      Table 1. Technical indicators

      Technical indicatorValue
      Field of view /［（°）×（°）］11.8×0.176
      Wavelength /nm115-180
      F#3
      Entrance pupil aperture /mm25
      Spectral resolution /nm2
      Spatial resolution /km10
      Device dimension /（mm×mm）16×16
      Stray light level10-2

    • Table 2. Structural parameters

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      Table 2. Structural parameters

      DeviceParameterValue
      Entrance pupilSize /（mm×mm）25×25
      LE-T /mm120
      Telescope mirrorTypeOff-axis parabolic mirror
      Radius /mm-150
      LT-S /mm-75
      slitWidth /mm0.23
      LS-G /mm-196
      TypeToroidal grating
      Diffraction gratingRadius /mm200/195.86
      Reticle density /（lp·mm-1）1200
      Diffraction order+1
      Incidence angle /（°）12.25
      Diffraction angle /（°）0.22
      LG-I /mm193.97

    • Table 3. Optical mechanical model parameters

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      Table 3. Optical mechanical model parameters

      ModelContent
      Light source500 mm away from the pupil
      Radiant power /W1
      Off-axis parabolic mirrorReflectivity 95%；absorption 5%
      Toroidal gratingWork level +1；1200 line/mm
      Mechanical surfaceLambert reflectance 2.5%；absorption 97.5%
      Number of scattered rays10
      Receiving surfaceMechanical absorber
      Number of trace rays2500000

    • Table 4. Central wavelength stray light level

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      Table 4. Central wavelength stray light level

      Wavelength /nmPower /W
      Stray light coefficient0.9975%
      115-1809.15597×10-4
      Stray light9.13×10-6
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    Yanfang Ju, Guochao Gu, Bo Li, Guanyu Lin, Zhengzheng Ma, Bin Xu. Stray-Light Suppression of Far Ultraviolet Ionization Layer Hyperspectral Imager[J]. Laser & Optoelectronics Progress, 2023, 60(10): 1030001

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    Paper Information

    Category: Spectroscopy

    Received: Oct. 12, 2022

    Accepted: Nov. 24, 2022

    Published Online: May. 17, 2023

    The Author Email: Bo Li (libo0008429@163.com)

    DOI:10.3788/LOP222759

    Topics

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