Infrared and Laser Engineering, Volume. 50, Issue 2, 20200427(2021)

Principle and optimum analysis of small near-infrared spectrometers based on digital micromirror device

Hongming Liu1,3, Yujuan Liu1, Ying Song1, Zhicheng Zhong1, Lingsheng Kong2, and Huaibin Liu2
Author Affiliations
  • 1Key Laboratory of Geophysical Exploration Equipment, Ministry of Education, College of Instrumentation & Electrical Engineering, Jilin University, Changchun 130021, China
  • 2Changchun Institute of Optics, Fine Mechanics and Physics, Chinese Academy of Sciences, Changchun 130012, China
  • 3Tonghua Normal University, Tonghua 134002, China
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    Figures & Tables(10)
    Schematic diagram of DMD-based spectrometer optical system
    Corresponding curves of different bands of InGaAs single-point detector
    Digital micromirror working principle diagram
    Diffraction efficiency curve
    System parameter diagram
    System optimization structure
    Spot diagram of the system simulation
    Spot diagram at different wavelengths during DMD imaging
    • Table 1. Main parameters of a DMD-based small NIR spectrometer

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      Table 1. Main parameters of a DMD-based small NIR spectrometer

      ParameterValue
      Wavelength range1000-1700 nm
      Spectral resolution<15 nm
      Size<150 mm×150 mm×150 mm
    • Table 2. Optical system design parameters

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      View in Article

      Table 2. Optical system design parameters

      ParameterValue
      Working wavelength1000-1700 nm
      Slit length1 mm
      Slit width50 μm
      Collimating lens focal length75 nm
      Imaging lens focal length45 nm
      Raster line density300 l/mm
      DMD pixel size7.6 μm×7.6 μm
      DMD pixel number1140×912 pixels
      DMD tilt angle±12°
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    Hongming Liu, Yujuan Liu, Ying Song, Zhicheng Zhong, Lingsheng Kong, Huaibin Liu. Principle and optimum analysis of small near-infrared spectrometers based on digital micromirror device[J]. Infrared and Laser Engineering, 2021, 50(2): 20200427

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    Paper Information

    Category: Lasers and laser optics

    Received: Dec. 5, 2020

    Accepted: --

    Published Online: Mar. 22, 2021

    The Author Email:

    DOI:10.3788/IRLA20200427

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