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Acta Optica Sinica, Volume. 41, Issue 18, 1811003(2021)

Scanless and Lensless 3D Endoscopic Imaging Through Coherent Fiber Bundle

Tong Wu1,2, Jiayi Ke1,2, Ziqi Song1, Di Mo1, and Jin Wu1、*
Author Affiliations
  • 1Aerospace Information Research Institute, Chinese Academy of Sciences, Beijing 100094, China
  • 2School of Electronic, Electrical and Communication Engineering, University of Chinese Academy of Sciences, Beijing 100094, China
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    AbstractGet PDF(in Chinese)
    Figures&Tables (12)
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    References (15)
    Cited By (3)
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    Figures & Tables(12)
    Operating principle of 3D endoscopic imaging

    Fig. 1. Operating principle of 3D endoscopic imaging

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    Schematic setup of imaging system

    Fig. 2. Schematic setup of imaging system

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    Structure of CFB

    Fig. 3. Structure of CFB

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    Schematic setup of the phase error precorrection system

    Fig. 4. Schematic setup of the phase error precorrection system

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    Imaging geometry of imaging system setup

    Fig. 5. Imaging geometry of imaging system setup

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    Spatial distribution of the CDD data after inverse Fourier transform

    Fig. 6. Spatial distribution of the CDD data after inverse Fourier transform

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    Data processing flow chart

    Fig. 7. Data processing flow chart

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    Position and size of the target. (a) Schematic of CFB and target placement; (b) schematic of the target size

    Fig. 8. Position and size of the target. (a) Schematic of CFB and target placement; (b) schematic of the target size

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    Power spectra of a point target. (a) Range resolution; (b) resolution in x direction; (c) resolution in y direction

    Fig. 9. Power spectra of a point target. (a) Range resolution; (b) resolution in x direction; (c) resolution in y direction

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    Simulation results. (a) CCD recorded data; (b) phase data after DH process; (c) phase data after phase error compensation; (d) range compressed image; (e) transversal focused image; (f) 3D image of the target after RCMC correcting

    Fig. 10. Simulation results. (a) CCD recorded data; (b) phase data after DH process; (c) phase data after phase error compensation; (d) range compressed image; (e) transversal focused image; (f) 3D image of the target after RCMC correcting

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    Projection diagrams of Fig.10(f). (a) Bottom view; (b) left side view

    Fig. 11. Projection diagrams of Fig.10(f). (a) Bottom view; (b) left side view

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    • Table 1. Simulated parameter setting

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      Table 1. Simulated parameter setting

      ItemParameterValue
      Central wavelength λ0 /nm1550
      Illuminating laserChirping bandwidth Br/THz3
      Pulse width τpul /ms20
      Local laserPosition (a,b) /(mm,mm)(3,3)
      Size (Dx×Dy) /(mm×mm)1×1
      CFB(facet shape: square)Core numbers (Nx×Ny)250×250
      Intervals (Δx×Δy) /(μm×μm)4×4
      CCDIntervals (Δu×Δv) /(μm×μm)20×20
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    Tong Wu, Jiayi Ke, Ziqi Song, Di Mo, Jin Wu. Scanless and Lensless 3D Endoscopic Imaging Through Coherent Fiber Bundle[J]. Acta Optica Sinica, 2021, 41(18): 1811003

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    Paper Information

    Category: Imaging Systems

    Received: Mar. 12, 2021

    Accepted: Apr. 16, 2021

    Published Online: Sep. 3, 2021

    The Author Email: Jin Wu (jwu909@263.net)

    DOI:10.3788/AOS202141.1811003

    Topics

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