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Acta Optica Sinica, Volume. 42, Issue 4, 0422001(2022)

Optical Design of Optical Passive Half-Athermalization Zoom Lens with High Zoom Ratio

Aqi Yan1、*, Wen Cui1,2, and Sen Dong1
Author Affiliations
  • 1Xi'an Institute Optics and Precision Mechanics, Chinese Academy of Sciences, Xi'an, Shaanxi 710119, China
  • 2University of Chinese Academy of Sciences, Beijing 100049, China
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    AbstractGet PDF(in Chinese)
    Figures&Tables (12)
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    References (11)
    Cited By (9)
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    Figures & Tables(12)
    Optical passive half-athermalization design method for zoom optical system

    Fig. 1. Optical passive half-athermalization design method for zoom optical system

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    Two-dimensional diagram of optical system. (a) Short focal length (focal length is 30 mm); (b) middle focal length (focal length is 450 mm); (c) long focal length (focal length is 1000 mm)

    Fig. 2. Two-dimensional diagram of optical system. (a) Short focal length (focal length is 30 mm); (b) middle focal length (focal length is 450 mm); (c) long focal length (focal length is 1000 mm)

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    MTF curves of optical system at different focal length positions. (a) EFL is 30 mm; (b) EFL is 450 mm; (c) EFL is 750 mm; (d) EFL is 1000 mm

    Fig. 3. MTF curves of optical system at different focal length positions. (a) EFL is 30 mm; (b) EFL is 450 mm; (c) EFL is 750 mm; (d) EFL is 1000 mm

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    Lateral chromatic aberration of optical system at different focal position. (a) EFL is 30 mm; (b) EFL is 450 mm; (c) EFL is 850 mm; (d) EFL is 1000 mm

    Fig. 4. Lateral chromatic aberration of optical system at different focal position. (a) EFL is 30 mm; (b) EFL is 450 mm; (c) EFL is 850 mm; (d) EFL is 1000 mm

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    MTF curves of short focal system (EFL is 30 mm) at high and low temperature. (a) -40 ℃; (b) +60 ℃

    Fig. 5. MTF curves of short focal system (EFL is 30 mm) at high and low temperature. (a) -40 ℃; (b) +60 ℃

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    MTF curves of optical system at different focal lengths in whole zoom process at -40 ℃ (after focusing only at long focal length). (a) EFL is 30 mm; (b) EFL is 450 mm; (c) EFL is 750 mm; (d) EFL is 1000 mm

    Fig. 6. MTF curves of optical system at different focal lengths in whole zoom process at -40 ℃ (after focusing only at long focal length). (a) EFL is 30 mm; (b) EFL is 450 mm; (c) EFL is 750 mm; (d) EFL is 1000 mm

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    MTF curves of optical system at different focal lengths in whole zoom process at +60 ℃ (after focusing only at long focal length). (a) EFL is 30 mm; (b) EFL is 450 mm; (c) EFL is 750 mm; (d) EFL is 1000 mm

    Fig. 7. MTF curves of optical system at different focal lengths in whole zoom process at +60 ℃ (after focusing only at long focal length). (a) EFL is 30 mm; (b) EFL is 450 mm; (c) EFL is 750 mm; (d) EFL is 1000 mm

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    • Table 1. Design specification of zoom optical system

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      Table 1. Design specification of zoom optical system

      IndexValue
      Wavelength /nm486-656
      Resolution of image sensor /(pixel×pixel)2000×1500
      Pixel size of image sensor /(μm×μm)5.5×5.5
      Effective focal length (EFL) /mm30-1000
      F-number≤F8
      Lateral color /μm≤6
      Relative distortion at shortfocal length position /%≥-0.9,≤+0.9
      Relative distortion at longfocal length position /%≥-0.8,≤+0.8

    • Table 2. Main optical parameters of optical system

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      Table 2. Main optical parameters of optical system

      ParameterValue
      Wavelength /nm486-656
      Resolution of image sensor /(pixel×pixel)2000×1500
      Pixel size of image sensor /(μm×μm)5.5×5.5
      F-numberF4.4-F8
      Diameter /mm138
      Length /mm460
      Image distance (BFL) /mm68.3

    • Table 3. Optical parameters of optical system at different effective focal lengths

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      Table 3. Optical parameters of optical system at different effective focal lengths

      ParameterEffective focal length (EFL) /mm
      303004506007508501000
      F-number4.46.46.97.37.47.78.0
      Field of view (FOV) /(°)25.9502.6101.7371.3021.0400.9200.782
      Distortion /%-0.7300.7500.7700.7800.7900.7940.800

    • Table 4. Focusing amount at long focal length position (object distance is infinity)

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      Table 4. Focusing amount at long focal length position (object distance is infinity)

      Temperature /℃-4020+60
      Focusing amount /mm+0.8170-0.560

    • Table 5. Focusing amount at short focal length position (object distance is infinity)

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      Table 5. Focusing amount at short focal length position (object distance is infinity)

      Temperature /℃-4020+60
      Focusing amount /mm000
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    Aqi Yan, Wen Cui, Sen Dong. Optical Design of Optical Passive Half-Athermalization Zoom Lens with High Zoom Ratio[J]. Acta Optica Sinica, 2022, 42(4): 0422001

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    Paper Information

    Category: Optical Design and Fabrication

    Received: Jun. 15, 2021

    Accepted: Aug. 27, 2021

    Published Online: Jan. 29, 2022

    The Author Email: Yan Aqi (yanaqi@opt.ac.cn)

    DOI:10.3788/AOS202242.0422001

    Topics

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