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Laser & Optoelectronics Progress, Volume. 58, Issue 1, 108002(2021)

Design of a Coaxial Catadioptric Telescope Objective with a Large Relative Aperture and Long Focal Length

Shen Zhijuan1,2 and Cao Yiqing2、*
Author Affiliations
  • 1School of Opto-Electronic and Communication Engineering, Xiamen University of Technology, Xiamen, Fujian 361024, China
  • 2School of Mechanical and Electrical Engineering, Putian University, Putian, Fujian 351100, China
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    AbstractGet PDF(in Chinese)
    Figures&Tables (8)
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    References (17)
    Cited By (4)
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    Figures & Tables(8)
    Preliminary selection structure and optical path schematic of objective lens

    Fig. 1. Preliminary selection structure and optical path schematic of objective lens

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    Optical scheme of double reflective mirrors

    Fig. 2. Optical scheme of double reflective mirrors

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    Relationship between M and the obstruction ratio α

    Fig. 3. Relationship between M and the obstruction ratio α

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    Structure diagram of the optimized telescope objective

    Fig. 4. Structure diagram of the optimized telescope objective

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    Goodness estimate curve

    Fig. 7. Goodness estimate curve

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    • Table 1. Design specifications of telescope objective

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      Table 1. Design specifications of telescope objective

      ParameterValue
      Wavelength /nm400-700
      Entrance pupil diameter /mm500
      Relative aperture1/1.8
      Total length /mm≤550
      Root-mean-square radius of spot diagram /μm≤8
      Modulation transfer function (MTF) at 107.5 lp/mm≥0.4

    • Table 2. Optical parameters of optimized telescope objective

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      Table 2. Optical parameters of optimized telescope objective

      SurfaceRadius/mmThickness/mmRefractiveindexAbbe number
      Object planeInfinityInfinity
      STOInfinity18.00
      22681.0022.831.6935053.3476
      3-23169.1316.67
      4-2579.2226.331.6204160.2917
      5-11368.41350.55
      6-1299.5233.611.6088158.9215
      7-1415.40-33.61Mirror
      8-1299.52-350.55
      9-11368.41-26.331.6204160.2917
      10-2579.2226.33Mirror
      11-11368.41342.35
      12-394.199.171.7725049.6013
      13-76.734.92
      14-59.109.721.6165936.6281
      15-126.1645.00
      Image planeInfinity

    • Table 3. Manufacturing and alignment tolerances of optical elements telescope objective

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      Table 3. Manufacturing and alignment tolerances of optical elements telescope objective

      Tolerance typeValue
      Surface toleranceRadius per fringe-8-8
      Thickness /mm-0.1-0.1
      Eccentric distance along X and Y directions /mm-0.015-0.015
      Tilt distance along X and Y directions /mm-0.015-0.015
      Element toleranceEccentric distance along X and Y directions /mm-0.01-0.01
      Tilt angle along X and Y directions /(°)-0.01-0.01
      Refraction index tolerance-0.0004-0.0004
      Abbe number tolerance /%-0.5-0.5
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    Shen Zhijuan, Cao Yiqing. Design of a Coaxial Catadioptric Telescope Objective with a Large Relative Aperture and Long Focal Length[J]. Laser & Optoelectronics Progress, 2021, 58(1): 108002

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    Paper Information

    Category: Geometric Optics

    Received: May. 6, 2020

    Accepted: --

    Published Online: Jan. 28, 2021

    The Author Email: Yiqing Cao (caoyiqing1987@163.com)

    DOI:10.3788/LOP202158.0108002

    Topics

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