Infrared and Laser Engineering, Volume. 50, Issue 3, 20200277(2021)

Design of 4f emission optical system for underwater laser circumferential scanning

Kun Zhong, Wei Su, Bo Peng, and Shaling Huang
Author Affiliations
  • Institute of Electronic Engineering, China Academy of Engineering Physics, Mianyang 621999, China
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    Figures & Tables(24)
    Sketch of torus window detection transmitting system design
    Sketch of 6-group transmitting system
    Scan beam envelops: (a), (c) side elevation and platform for toroidal window; (b), (d) side elevation and platform for 4f system
    Structure of transmitting system
    Transmitting angle error in air
    Underwater propagation angle deviation of the beam
    Plane window emission system structure
    Conformal window structure after optimization
    Transmitting angle error of plane window system in water
    Transmitting angle error of conformal window system in water
    Beam section spot after 20 m under water propagation:(a)- (e) Spot of plane window system; (f)-(j) Spot of conformal window system
    Spot energy distribution: (a)-(e) Spot energy distribution of plane window system; (f)-(j) Spot energy distribution of conformal window system
    • Table 1. [in Chinese]

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      Table 1. [in Chinese]

      Former group parameterValueLatter group parameterValue
      Image height/mm40Image height/mm40
      f1/mm 37.615f2/mm 22.370
      Total length/mm≤90Total length/mm≤60
      Field/(°)±28Field/(°)±41.799
    • Table 2. [in Chinese]

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      Table 2. [in Chinese]

      Former group parameterValueLatter group parameterValue
      Image height/mm40.000Image height/mm40.000
      f1/mm 39.669f2/mm 27.045
      Total length/mm90.000Total length/mm60.000
      Field/(°)±28Field/(°)±41.799
    • Table 3. [in Chinese]

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      Table 3. [in Chinese]

      ${\theta _1}$/(°) Former group image height/mm${\theta _2}$/(°) Latter group image height/mm
      0000
      8.45.82612.5405.903
      149.74320.9009.863
      19.613.72929.25913.706
      2819.99041.79919.932
    • Table 4. [in Chinese]

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      Table 4. [in Chinese]

      LensSurfaceSurface typeRadius/mmThickness/mmMaterialSemi-diameter/mm
      StopStandardInfinity20.000Air0.577
      L11Standard−64.8757.999H-BAK110.736
      2Standard245.8254.563Air14.397
      L23Standard−62.4295.870H-ZF7LA15.940
      4Standard−28.1951.844Air17.045
      L35Standard83.1488.000H-BAK120.280
      6Standard−65.61441.725Air20.513
      Focus planeStandardInfinity16.725Air20.000
      L47Standard72.5846.308H-BAK120.196
      8Standard−178.8961.000Air19.981
      L59Standard35.0817.426H-ZF7LA18.457
      10Standard83.95815.541Air16.967
      L611Standard13.9858.000H-BAK18.067
      12Standard22.22910.000Air4.536
      L713StandardInfinity5.000H-BAK14.816
      14StandardInfinity20000.000Water7.233
      ImageStandardInfinity0.000Water11552.561
    • Table 5. [in Chinese]

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      Table 5. [in Chinese]

      LensSurfaceSurface typeRadius/mmThickness/mmMaterialSemi-diameter/mm
      StopStandardInfinity20.000Air0.577
      L11Standard−64.8757.999H-BAK110.736
      2Standard245.8254.563Air14.397
      L23Standard−62.4295.870H-ZF7LA15.940
      4Standard−28.1951.844Air17.045
      L35Standard83.1488.000H-BAK120.280
      6Standard−65.61441.725Air20.513
      Focus planeStandardInfinity15.812Air20.000
      L47Standard76.0496.190H-BAK120.184
      8Standard−172.7211.000Air19.982
      L59Standard35.0898.000H-ZF7LA18.487
      10Standard76.46216.200Air16.750
      L611Standard12.7827.798H-BAK17.894
      12Standard20.50810.000Air4.523
      L713Toroidal−235.1455.000H-BAK14.710
      14Toroidal−160.00020000.000Water7.117
      ImageStandardInfinity0.0000Water11552.735
    • Table 6. [in Chinese]

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      Table 6. [in Chinese]

      ${\theta _1}$/(°) X beam size/mm X divergence/mrad Ybeam size/mm Ydivergence/mrad
      030.6181.51330.6181.513
      8.426.9311.31327.2271.311
      1420.7460.98622.3331.026
      19.612.7840.58418.3750.786
      2810.0980.44627.9751.034
    • Table 7. [in Chinese]

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      Table 7. [in Chinese]

      ${\theta _1}$/(°) X beam size/mm X divergence/mrad Y beam size/mm Y divergence/mrad
      026.4021.30331.5761.561
      8.422.5531.09727.9431.346
      1416.2080.76822.7321.044
      19.69.0280.41318.6110.797
      2814.7000.64929.7551.101
    • Table 8. [in Chinese]

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      Table 8. [in Chinese]

      ${\theta _1}$/(°) Efficiency (plane window)Efficiency (conformal window)
      047.0214%46.9997%
      8.447.0576%47.0356%
      1447.1184%47.0960%
      19.647.1941%47.1730%
      2847.2029%47.2045%
    • Table 9. [in Chinese]

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      Table 9. [in Chinese]

      ${\theta _1}$/(°) Efficiency (plane window)Efficiency (conformal window)
      090.935%90.893%
      8.491.006%90.963%
      1491.132%91.088%
      19.691.320%91.276%
      2891.719%91.679%
    • Table 10. [in Chinese]

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      Table 10. [in Chinese]

      ${\theta _1}$/(°) Efficiency (plane window)Efficiency (conformal window)
      095.803%95.759%
      8.495.878%95.833%
      1496.011%95.965%
      19.696.210%96.163%
      2896.629%96.587%
    • Table 11. [in Chinese]

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      Table 11. [in Chinese]

      ProbabilityRMS spot radius/mm
      8.4°14°19.6°28°
      98%≤9.6039.8779.87818.67518.697
      90%≤8.8959.0929.07417.99317.986
      50%≤7.6097.6957.67316.84816.826
      10%≤6.3246.3246.30915.76015.734
      2%≤5.5995.5535.50615.16415.122
    • Table 12. [in Chinese]

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      Table 12. [in Chinese]

      ProbabilityRMS spot radius/mm
      8.4°14°19.6°28°
      98%≤8.71312.90912.96922.55722.596
      90%≤7.94912.02612.05721.77521.792
      50%≤6.58410.50710.52120.49820.511
      10%≤5.2609.0369.07119.30519.332
      2%≤4.5378.2418.26318.68318.684
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    Kun Zhong, Wei Su, Bo Peng, Shaling Huang. Design of 4f emission optical system for underwater laser circumferential scanning[J]. Infrared and Laser Engineering, 2021, 50(3): 20200277

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    Paper Information

    Category: Optical design

    Received: Jul. 14, 2020

    Accepted: --

    Published Online: Jul. 15, 2021

    The Author Email:

    DOI:10.3788/IRLA20200277

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