Laser & Optoelectronics Progress, Volume. 62, Issue 15, 1522004(2025)

Design of Near-Infrared Wide-Angle Lens Based on Anamorphic Asphere and Free-Form Surfaces

Yu Wang1, Li Chen1、*, and Jiawei Zhu2
Author Affiliations
  • 1School of Physics and Optoeletronic Engineering, Guangdong University of Technology,Guangzhou 510006, Guangdong , China
  • 2Zhongshan Zhongying Optical Co., Ltd., Zhongshan 528441, Guangdong , China
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    Figures & Tables(19)
    Initial structural diagram before optimization
    Optimized initial structural diagram
    Optimized lens structure YZ view
    Optimized lens structure XZ view
    MTF curves at Nyquist frequency
    Field curve and distortion diagram
    Distorted mesh
    Image simulation comparison
    Relative illuminance curve
    Tolerance sensitivity curve
    MTF of the system from -10 ℃ to 20 ℃
    MTF of the system from 20 ℃ to 40 ℃
    MTF of the system from 40 ℃ to 60 ℃
    • Table 1. Main parameters of near-infrared wide-angle lens

      View table

      Table 1. Main parameters of near-infrared wide-angle lens

      ItemSpecification
      FOV /(°)Horizontal>100
      Vertical>50
      Effective focal length /mm0.5‒1
      F /number3‒4
      Optical distortion<10%
      Relative illumination>50%
      Total length /mm<15
      Working distance /mm>500
      Lens structure4P+IR
    • Table 2. System structure parameters

      View table

      Table 2. System structure parameters

      SurfaceTypeY radius /mmX radius /mmThickness /mmMaterial
      ObjectSphereInfiniteInfinite1000.0000
      1Anamorphic asphere20.551379.56000.92511.58∶29
      2Anamorphic asphere0.56042.95381.3536
      3XY polynomial2.79602.79602.66341.68∶18.1
      4Anamorphic asphere4.74739.03110.2093
      STOPSphereInfiniteInfinite0.0200
      6Anamorphic asphere90.2195-5.32761.33731.64∶22.4
      7Anamorphic asphere-1.5435-2.30200.0200
      8Anamorphic asphere-7.60105.55942.17001.58∶29
      9Anamorphic asphere-2.3750-13.88851.4704
      10SphereInfiniteInfinite0.70001.51∶64.2
      11SphereInfiniteInfinite0.7083
      ImageSphereInfiniteInfinite0.0023
    • Table 3. Coefficients of surface 3 before using XYpolynomial freeform

      View table

      Table 3. Coefficients of surface 3 before using XYpolynomial freeform

      CoefficientValueCoefficientValue
      x8.0787y5.3328
      cx-303.0136cy-36.5915
      A0.0420AP-0.1263
      B-0.0626BP-0.2716
      C-0.0029CP0.5007
      D0.0251DP0.5620
    • Table 4. Coefficients of XY polynomial freeform surface

      View table

      Table 4. Coefficients of XY polynomial freeform surface

      CoefficientValueCoefficientValue
      x2-0.0488x2y20.1153
      x40.0902x2y4-0.0704
      x6-0.0776x2y60.0125
      x80.0726x2y80.0071
      x10-0.0265x4y2-0.1324
      y2-0.0017x4y40.1650
      y4-0.0011x4y6-0.0717
      y60.0120x6y20.0977
      y8-0.0131x6y4-0.0490
      y100.0035x8y2-0.0267
    • Table 5. Design parameters

      View table

      Table 5. Design parameters

      ItemSpecification
      FOV /(°)Horizontal127
      Vertical70
      Effective focal length /mm0.8
      F /number3.5
      Optical distortion<10%
      Relative illumination>70%
      Total length /mm11.9
      Working distance /mm>1000
      Lens structure4P+IR
    • Table 6. Tolerance parameters setting

      View table

      Table 6. Tolerance parameters setting

      No.TypeApplication surfaceValue
      1DLT1‒4,6‒100.002 mm
      2DLF1‒4,6‒105
      3CYN1‒4,6‒101
      4DLA1‒4,6‒100.001 rad
      5DLV1,3,6,80.008%/100
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    Yu Wang, Li Chen, Jiawei Zhu. Design of Near-Infrared Wide-Angle Lens Based on Anamorphic Asphere and Free-Form Surfaces[J]. Laser & Optoelectronics Progress, 2025, 62(15): 1522004

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    Paper Information

    Category: Optical Design and Fabrication

    Received: Nov. 21, 2024

    Accepted: Feb. 4, 2025

    Published Online: Aug. 11, 2025

    The Author Email: Li Chen (ggchenli@gdut.edu.cn)

    DOI:10.3788/LOP242298

    CSTR:32186.14.LOP242298

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