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Acta Optica Sinica, Volume. 42, Issue 23, 2322001(2022)

Optical System Design of Full-Spectrum Hyperspectral Imaging Spectrometer

Jian Ma1,2, Junqiang Zhang1,3、*, Congjun Wu1、**, Xinquan Li1,2, Tianjiao Lu1,2, and Bin Yang3
Author Affiliations
  • 1Changchun Institute of Optics, Fine Mechanics and Physics, Chinese Academy of Sciences, Changchun 130031, Jilin , China
  • 2University of Chinese Academy of Sciences, Beijing 101400, China
  • 3Yusense Information Technology and Equipment (Qingdao) Inc., Qingdao 260000, Shandong , China
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    AbstractGet PDF(in Chinese)
    Figures&Tables (13)
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    References (17)
    Cited By (3)
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    Figures & Tables(13)
    Design scheme of optical system

    Fig. 1. Design scheme of optical system

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    Coaxial three-mirror system

    Fig. 2. Coaxial three-mirror system

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    Optical path diagram of front telescopic system. (a) Overall optical path; (b) optical path at image plane

    Fig. 3. Optical path diagram of front telescopic system. (a) Overall optical path; (b) optical path at image plane

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    MTF curves of each spectral segment. (a) VNIR spectrum ;(b) SWIR spectrum ;(c) MWIR spectrum;(d) LWIR spectrum

    Fig. 4. MTF curves of each spectral segment. (a) VNIR spectrum ;(b) SWIR spectrum ;(c) MWIR spectrum;(d) LWIR spectrum

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    Optical path diagram of Offner spectral imaging system with convex grating. (a) Incident optical path ; (b) outgoing optical path

    Fig. 5. Optical path diagram of Offner spectral imaging system with convex grating. (a) Incident optical path ; (b) outgoing optical path

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    Optical path diagram of Offner spectrometer in each spectral band. (a) VNIR; (b) SWIR; (c) MWIR; (d) LWIR

    Fig. 6. Optical path diagram of Offner spectrometer in each spectral band. (a) VNIR; (b) SWIR; (c) MWIR; (d) LWIR

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    Optical structure diagram of whole system

    Fig. 7. Optical structure diagram of whole system

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    MTF curve of center wavelength of each spectral band in whole system. (a) 0.7 μm; (b) 1.7 μm; (c) 4.0 μm; (d) 10.2 μm

    Fig. 8. MTF curve of center wavelength of each spectral band in whole system. (a) 0.7 μm; (b) 1.7 μm; (c) 4.0 μm; (d) 10.2 μm

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    Cross-sectional view of point spread function of each spectral band. (a) VNIR; (b) SWIR; (c) MWIR; (d) LWIR

    Fig. 9. Cross-sectional view of point spread function of each spectral band. (a) VNIR; (b) SWIR; (c) MWIR; (d) LWIR

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    • Table 1. Technical specifications of optical system

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      Table 1. Technical specifications of optical system

      SpecificationVNIRSWIRMWIRLWIR
      Spectral range /μm0.4-1.01.0-2.53.0-5.08.0-12.5
      Field of view /（°）2.8642.8642.8642.864
      Focal length /mm400400360244

      Detector pixel size /

      （μm×μm）

      		20×2020×2030×3030×30
      Number of spatial dimension pixels10241024640640
      Spectral resolution /nm51050100
      Pixel resolution /m30305074

    • Table 2. Design parameters of multiple configurations

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      Table 2. Design parameters of multiple configurations

      Design parameterConfiguration 1Configuration 2Configuration 3Configuration 4
      Off-axis field of view /（°）-9.3-9.3-9.0-8.7
      FOV No.1123
      SpectrumVNIRSWIRLWIRMWIR
      Spectral range /μm0.4-1.01.0-2.58.0-12.53.0-5.0

    • Table 3. Initial structural parameters of Offner spectrometer in each spectral band

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      Table 3. Initial structural parameters of Offner spectrometer in each spectral band

      ParameterVNIRSWIRMWIRLWIR
      RG /mm66.6766.6760.0050.00
      Slit width /μm20.0020.0033.3049.18
      Slit length /mm20202020
      Magnification1.001.000.900.61
      Spectral broadening /mm2.403.001.201.35

    • Table 4. MTF of different wavelengths at Nyquist frequency for each spectral band spectrometer

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      Table 4. MTF of different wavelengths at Nyquist frequency for each spectral band spectrometer

      SpectrumWavelength /μmMTF
      VNIR0.40.84
      0.70.74
      1.00.70
      SWIR1.00.65
      1.70.70
      2.50.65
      MWIR3.00.80
      4.00.77
      5.00.71
      LWIR8.00.66
      10.20.60
      12.50.55
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    Jian Ma, Junqiang Zhang, Congjun Wu, Xinquan Li, Tianjiao Lu, Bin Yang. Optical System Design of Full-Spectrum Hyperspectral Imaging Spectrometer[J]. Acta Optica Sinica, 2022, 42(23): 2322001

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    Paper Information

    Category: Optical Design and Fabrication

    Received: Apr. 1, 2022

    Accepted: Jun. 8, 2022

    Published Online: Dec. 14, 2022

    The Author Email: Zhang Junqiang (zhangjq@ciomp.ac.cn), Wu Congjun (wucongjun@ciomp.ac.cn)

    DOI:10.3788/AOS202242.2322001

    Topics

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