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Infrared and Laser Engineering, Volume. 50, Issue 3, 20200197(2021)

Design of high-density coaxial four-mirror optical system with field-bias and multi-light-channel coupled

Yuchen Zhao1... Changhong Hu1, Hengyi Lv1, Ming Sun2 and Zhaonan Li3 |Show fewer author(s)
Author Affiliations
  • 1Changchun Institute of Optics, Fine Mechanics and Physics, Chinese Academy of Sciences, Changchun 130022, China
  • 2College of Computer Science and Technology, Jilin University, Changchun 13002, China
  • 3Beijing Satellite Navigation Center, Beijing 100094, China
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    AbstractGet PDF(in Chinese)
    Figures&Tables (15)
    Equations (12)
    References (11)
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    Figures & Tables(15)
    Layout of coaxial four-mirror optical system

    Fig. 1. Layout of coaxial four-mirror optical system

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    Initial configuration of the system

    Fig. 2. Initial configuration of the system

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    Optical pathway diagram of system

    Fig. 3. Optical pathway diagram of system

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    Optical pathway diagram of MWIR channel

    Fig. 4. Optical pathway diagram of MWIR channel

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    Location of the field of view

    Fig. 5. Location of the field of view

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    MTF curves of different channel

    Fig. 6. MTF curves of different channel

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    Distortion grid of different channel

    Fig. 7. Distortion grid of different channel

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    Curves of tolerance probability

    Fig. 8. Curves of tolerance probability

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    • Table 1. [in Chinese]

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      Table 1. [in Chinese]

      Radius/mmThickness/mmConicAspheric surface high-order termMirror size/mm
      Primary mirror−1028.272−420−0.98688thΦ400
      Secondary mirror−224.486676.2−1.5875-Φ88
      FM-−175.3--98×65
      Tertiary mirror403.217230.5−1.12458th148×56
      Quartus mirror−981.876−237.21--Φ53

    • Table 2. [in Chinese]

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      Table 2. [in Chinese]

      123456
      x/(°) 00.350.490.70.7−0.7
      y/(°) 0.750.750.750.750.650.85

    • Table 3. [in Chinese]

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      Table 3. [in Chinese]

      FOVVIS WFE RMSMWIR WFE RMS
      (0°, 0.75°)0.01830.041
      (0.35°, 0.75°)0.01550.0281
      (0.49°, 0.75°)0.01790.0255
      (0.70°, 0.75°)0.01980.0281
      (0.70°, 0.65°)0.01970.0292
      (−0.70°, 0.85°)0.02660.03

    • Table 4. [in Chinese]

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      Table 4. [in Chinese]

      No.FOVChannel
      VIS channelMWIR channel
      1(0°, 0.75°)RMS=0.0027 100% size=0.0063 RMS=0.0097 100% size=0.018
      2(0.35°, 0.75°)RMS=0.0021 100% size=0.0051 RMS=0.0061 100% size=0.013
      3(0.49°, 0.75°)RMS=0.0020 100% size=0.0047 RMS=0.0062 100% size=0.019
      4(0.70°, 0.75°)RMS=0.0021 100% size=0.0038 RMS=0.0063 100% size=0.019
      5(0.70°, 0.65°)RMS=0.0020 100% size=0.0045 RMS=0.0069 100% size=0.025
      6(−0.70°, 0.85°)RMS=0.0026 100% size=0.0056 RMS=0.0076 100% size=0.022

    • Table 5. [in Chinese]

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      Table 5. [in Chinese]

      TypeItemPrimary mirrorSecondary mirrorThird mirrorQuartus mirror
      Displacement x/mm Reference for alignment0.050.030.08
      Displacement y/mm 0.020.050.05
      AssemblingDisplacement z/mm 0.10.050.08
      Tilt α/(″) 152020
      Tilt β/(″) 101020
      Tilt γ/(″) 3020-
      ΔR/mm 10.50.81
      ManufacturingΔK0.00080.0020.002-
      ΔB5.0×10−20-5×10−17-
      ΔC5.0×10−25-5×10−20-
      Surface error RMS(λ=632.8 nm) λ/50 λ/60 λ/50 λ/30

    • Table 6. [in Chinese]

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      Table 6. [in Chinese]

      TypeItemLens 1Lens 2Lens 3Lens 4Lens 5
      Displacement x/mm 0.020.050.020.040.05
      Displacement y/mm 0.020.050.020.040.05
      AssemblingDisplacement z/mm 0.040.080.040.10.1
      Tilt α/(″) 1520151520
      Tilt β/(″) 1520151520
      DLF33333
      ManufacturingΔK（concave surface） 0.002--0.002-
      Surface error RMS(λ=632.8 nm) λ/30 λ/30 λ/30 λ/30 λ/30

    • Table 7. [in Chinese]

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      Table 7. [in Chinese]

      Cumulative probability MTF
      Visible（71.4 lp/mm）MWIR（25 lp/mm）
      50%0.3710.395
      84.1%0.3630.347
      97.7%0.3510.318
      99.9%0.3320.305
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    Yuchen Zhao, Changhong Hu, Hengyi Lv, Ming Sun, Zhaonan Li. Design of high-density coaxial four-mirror optical system with field-bias and multi-light-channel coupled[J]. Infrared and Laser Engineering, 2021, 50(3): 20200197

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    Paper Information

    Category: Optical design

    Received: May. 27, 2020

    Accepted: --

    Published Online: Jul. 15, 2021

    The Author Email:

    DOI:10.3788/IRLA20200197

    Topics

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