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Laser & Optoelectronics Progress, Volume. 55, Issue 6, 062204(2018)

Design of High Power Laser Focus System over Variable Long Distance

Mingyong Hu, Zhiwei Feng*; , Errong Fan, Qi Zhao, and Mingjie Li
Author Affiliations
  • Academy of Photoelectric Technology, Hefei University of Technology, Hefei, Anhui 230000, China
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    AbstractGet PDF(in Chinese)
    Figures&Tables (10)
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    References (14)
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    Figures & Tables(10)
    Structural diagram of Cassegrain system

    Fig. 1. Structural diagram of Cassegrain system

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    Structural diagram of optical system

    Fig. 2. Structural diagram of optical system

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    Cassegrain system. (a) Spot diagram; (b) wavefront map

    Fig. 3. Cassegrain system. (a) Spot diagram; (b) wavefront map

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    (a) Relationship between object distance and system focal length; (b) relationship between object distance and focusing spot diameter; (c) relationship between system focal length and focusing spot diameter

    Fig. 4. (a) Relationship between object distance and system focal length; (b) relationship between object distance and focusing spot diameter; (c) relationship between system focal length and focusing spot diameter

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    Full field spot diagrams under different object distances. (a) 500 m; (b) 1000 m; (c) 2000 m; (d) 3000 m; (e) 4000 m; (f) 5000 m

    Fig. 5. Full field spot diagrams under different object distances. (a) 500 m; (b) 1000 m; (c) 2000 m; (d) 3000 m; (e) 4000 m; (f) 5000 m

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    MTF under different object distances. (a) 500 m; (b) 1000 m; (c) 2000 m; (d) 3000 m; (e) 4000 m; (f) 5000 m

    Fig. 6. MTF under different object distances. (a) 500 m; (b) 1000 m; (c) 2000 m; (d) 3000 m; (e) 4000 m; (f) 5000 m

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    Practical system. (a) Front view; (b) back view

    Fig. 7. Practical system. (a) Front view; (b) back view

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    • Table 1. Specifications of size distribution of focusing spot

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      Table 1. Specifications of size distribution of focusing spot

      Object distance /mSpot diameter /mm
      500-1000<40
      1000-2000<60
      2000-3000<80
      3000-4000<110
      4000-5000<150

    • Table 2. System parameters when object distance is 5000 m

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      Table 2. System parameters when object distance is 5000 m

      SurfaceNo.Radius /mmThickness /mmSurfacetypeDiameter /mmConic
      1Infinity1010.50
      2166.673Lens160
      3-27.912160
      4-31.6603Lens160
      531.660920.67160
      6392.86-475Mirror98-1.906
      712805000000Mirror400-1

    • Table 3. Relationship between object distance and focusing spot diameter

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      Table 3. Relationship between object distance and focusing spot diameter

      Object distance /mSystem focal length /mmDistance to secondary mirror /mmSpot diameter /mm
      50014590.8950.3812.3
      80023572.5937.8219.8
      100029536.8933.725.3
      200059352.4925.5250.5
      300088844.9922.8376.7
      4000118361921.48101.9
      5000147829920.67127.1
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    Mingyong Hu, Zhiwei Feng, Errong Fan, Qi Zhao, Mingjie Li. Design of High Power Laser Focus System over Variable Long Distance[J]. Laser & Optoelectronics Progress, 2018, 55(6): 062204

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    Paper Information

    Category: Optical Design and Fabrication

    Received: Dec. 21, 2017

    Accepted: --

    Published Online: Sep. 11, 2018

    The Author Email: Zhiwei Feng ( fengzwchn@163.com)

    DOI:10.3788/LOP55.062204

    Topics

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