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Range walk error correction for MPPC array-based high-precision 3D imaging.

Rui Wang, Linhai Huang, Yuanmeng Ban

    Optics Express
    |April 12, 2025
    PubMed
    Summary
    This summary is machine-generated.

    This study introduces an efficient method to correct range walk error in multi-pixel photon counter (MPPC) array 3D imaging. The technique significantly improves depth accuracy for targets with varying reflectivity, enhancing remote sensing capabilities.

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    Area of Science:

    • Photonics and Optical Sensing
    • Remote Sensing Technologies
    • Advanced Imaging Systems

    Background:

    • Multi-pixel photon counter (MPPC) array technology offers potential for 3D remote sensing.
    • Range walk error (RWE) caused by target reflectivity variations limits MPPC array imaging performance.

    Purpose of the Study:

    • To develop and validate an efficient RWE correction method for MPPC array-based 3D imaging.
    • To improve the accuracy and robustness of MPPC arrays in complex environments with fluctuating echo energy.

    Main Methods:

    • Proposed an RWE correction method combining threshold voltage modulation and macro-pixel linear regression.
    • Utilized single-frame images at four different threshold voltages for initial correction.
    • Incorporated multi-frame techniques for further depth accuracy enhancement.

    Main Results:

    • Reduced depth difference in planar targets from 76.51 cm to 1.17 cm (98.47% reduction) using single-frame images.
    • Achieved depth differences below 0.69 cm with multi-frame techniques.
    • Demonstrated superior correction performance for non-planar targets, significantly improving 3D imaging accuracy.

    Conclusions:

    • The proposed RWE correction method is effective in enhancing MPPC array 3D imaging accuracy.
    • The method improves the robustness of MPPC arrays under fluctuating echo energy conditions.
    • Provides crucial technical support for long-range detection in complex remote sensing environments.