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Chinese Optics Letters, Volume. 16, Issue 4, 041101(2018)

Depth resolution improvement of streak tube imaging lidar system using three laser beams

Zhaodong Chen1, Rongwei Fan1, Guangchao Ye2, Tong Luo1, Jiayu Guan1, Zhigang Zhou1, and Deying Chen1、*
Author Affiliations
  • 1National Key Laboratory of Science and Technology on Tunable Laser, Harbin Institute of Technology, Harbin 150080, China
  • 2Heilongjiang Institute of Technology, Harbin 150050, China
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    Schematic of the STIL system. (a) Schematic of the data collection process. (b) The work principle of the streak array detector. (c) The streak image on the CCD.

    Fig. 1. Schematic of the STIL system. (a) Schematic of the data collection process. (b) The work principle of the streak array detector. (c) The streak image on the CCD.

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    Optical emission part of the three-laser-beam STIL system.

    Fig. 2. Optical emission part of the three-laser-beam STIL system.

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    Streak image of a simple plane.

    Fig. 3. Streak image of a simple plane.

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    Error between the calculated value and theoretical value.

    Fig. 4. Error between the calculated value and theoretical value.

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    Distance error with the theoretical distance.

    Fig. 5. Distance error with the theoretical distance.

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    (a) Schematic of the three-laser-beam STIL system. (b) The streak signal of Beam A, Beam B, and Beam C on the CCD.

    Fig. 6. (a) Schematic of the three-laser-beam STIL system. (b) The streak signal of Beam A, Beam B, and Beam C on the CCD.

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    (a) Photograph of the model. (b) Size of the base. The unit is millimeters. (c) Heights of “H”, “I”, “T”, and “!”. They are 2, 5, 10, and 20 mm, respectively.

    Fig. 7. (a) Photograph of the model. (b) Size of the base. The unit is millimeters. (c) Heights of “H”, “I”, “T”, and “!”. They are 2, 5, 10, and 20 mm, respectively.

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    Results of the 3D imaging experiment. Different colors are used to represent distances. (a) The image obtained using only Beam A, (c) the image obtained using Beam A and Beam B, and (e) the image obtained using Beam A, Beam B, and Beam C. (b), (d), and (f) are the cutaway drawings of (a), (c), and (e) near the blue line separately.

    Fig. 8. Results of the 3D imaging experiment. Different colors are used to represent distances. (a) The image obtained using only Beam A, (c) the image obtained using Beam A and Beam B, and (e) the image obtained using Beam A, Beam B, and Beam C. (b), (d), and (f) are the cutaway drawings of (a), (c), and (e) near the blue line separately.

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    • Table 1. Parameters of the STIL System

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      Table 1. Parameters of the STIL System

      ParameterValue
      Wavelength of the laser532 nm
      Repetition rate of the laser1000 Hz
      Pulse width of the laser1 ns
      Power of the laser∼30  mW
      CCD resolution(spatial-resolved × time-resolved)1000×500
      CCD grayscale0–255
      Time bin size, tbin0.066 ns
      Target distance∼6.98  m
      Jitter of DG645<25  ps
      Jitter of sweep voltages∼500  ps
      Jitter of the laser output<400  ps
      Field-of-view∼1.2°
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    Zhaodong Chen, Rongwei Fan, Guangchao Ye, Tong Luo, Jiayu Guan, Zhigang Zhou, Deying Chen, "Depth resolution improvement of streak tube imaging lidar system using three laser beams," Chin. Opt. Lett. 16, 041101 (2018)

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    Paper Information

    Category: Imaging Systems

    Received: Jan. 17, 2018

    Accepted: Feb. 9, 2018

    Published Online: Jul. 12, 2018

    The Author Email: Deying Chen (deyingchenhit@163.com)

    DOI:10.3788/COL201816.041101

    Topics

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