Infrared and Laser Engineering, Volume. 52, Issue 7, 20230322(2023)

Design of compact telephoto mobile phone lens based on freeform surface (invited)

Ningyan Xu1, Zhishan Gao1, Lu Chen2, Jing Huang1, Yutong Zou1, and Qun Yuan1、*
Author Affiliations
  • 1School of Electronic and Optical Engineering, Nanjing University of Science and Technology, Nanjing 210094, China
  • 2Jiangsu Institute of Metrology (Jiangsu Energy Measurement Data Center), Nanjing 210023, China
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    Figures & Tables(16)
    Periscopic-type telephoto lens
    (a)-(d) 4 structures of unobscured positive-negative-positive (PNP) reflective imagers; (e)-(f) Relative positions of conic surfaces corresponding to (a)-(d)
    Layout of compact telephoto lens
    Schematic diagram of characteristic ray tracing
    Schematic diagram of expanding FOV
    Flow chart for expanding FOV optimization
    Layout of compact telephoto lens after optimization
    MTF curves
    (a) Curve of relative illumination; (b) Curve of distortion
    Simulation of imaging performance. (a) Object; (b) Image
    • Table 1. Parameters of telephoto lens on mobile phones

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      Table 1. Parameters of telephoto lens on mobile phones

      YearBrandTypeF/#Equivalent focal length/mm
      2019HuaweiP303.4125
      2022HonorMagic4 Pro3.595
      2022SamsungGalaxy S222.469
      2022VivoX80 Pro3.4125
      2022OnePlus10 Pro2.477
      2022Xiaomi12S Ultra4.1120
    • Table 2. Design parameters of optical system

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      Table 2. Design parameters of optical system

      ParameterValue
      Aperture/mm10
      F-number 5
      Equivalent focal length/mm196
      FOV/(°)±3.8
      Spectral bands/μm0.38-0.78
      Image plane size/mm26.6×8.8
    • Table 3. Structural parameter of starting geometry

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      Table 3. Structural parameter of starting geometry

      θiValue/(°)diValue/mm
      θ1150d114.72
      θ2120d214.72
      θ3150d317.74
    • Table 4. Distribution of focal power for each surface

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      Table 4. Distribution of focal power for each surface

      φφ1φ2φ3
      Value/mm−10.020.01-0.0170.18
    • Table 5. Surface parameter of starting geometry

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      Table 5. Surface parameter of starting geometry

      ri/mm di/mm ki
      M1107.3915.72−1
      M229.5814.86−0.3
      M328.05520.45−0.17
    • Table 6. Feature ray parameter

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      Table 6. Feature ray parameter

      PupilFieldCoordinate (z, y)
      PxPyHxHyM1M2M3Image
      R10101O11(z11, y11) O12(z12, y12) O13(z13, y13) O14(z14, y14)
      R20−101O21(z21, y21) O22(z22, y12) O23(z23, y23) O24(z24, y24)
      R3010−1O31(z31, y31) O32(z32, y32) O33(z33, y33) O34(z34, y34)
      R40−10−1O41(z41, y41) O42(z42, y42) O43(z43, y43) O44(z44, y44)
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    Ningyan Xu, Zhishan Gao, Lu Chen, Jing Huang, Yutong Zou, Qun Yuan. Design of compact telephoto mobile phone lens based on freeform surface (invited)[J]. Infrared and Laser Engineering, 2023, 52(7): 20230322

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    Paper Information

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    Received: May. 31, 2023

    Accepted: --

    Published Online: Aug. 16, 2023

    The Author Email: Yuan Qun (yuanqun@njust.edu.cn)

    DOI:10.3788/IRLA20230322

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