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A Protocol for Real-time 3D Single Particle Tracking
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High precision 3D imaging with timing corrected single photon LiDAR.

Cheng Zhang, Yupeng Wang, Yongkai Yin

    Optics Express
    |July 21, 2023
    PubMed
    Summary

    This study introduces a dual single-photon avalanche diode (SPAD) LiDAR system to eliminate ranging errors caused by laser pulse energy fluctuations. The novel system uses a reference optical path for precise 3D imaging and high-accuracy distance measurements.

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    Area of Science:

    • Photonics
    • Optical Engineering
    • 3D Imaging Technologies

    Background:

    • Single photon light detection and ranging (LiDAR) is crucial for high-precision 3D imaging.
    • Existing LiDAR systems suffer from ranging errors due to laser pulse energy fluctuations affecting timing synchronization.

    Purpose of the Study:

    • To develop a dual SPADs LiDAR system that corrects ranging errors caused by fluctuating laser pulse energy.
    • To achieve high-precision ranging and 3D imaging by mitigating inherent system limitations.

    Main Methods:

    • Implementation of a dual single-photon avalanche diode (SPAD) LiDAR system.
    • Incorporation of a reference optical path to correct signal photon flight times using reference photons.
    • Experimental validation of the system's performance.

    Main Results:

    • The proposed LiDAR system effectively corrects ranging errors stemming from laser pulse energy variations.
    • Achieved a range error of 0.15 mm and a range resolution of 0.3 mm at a distance of 29 m.
    • Demonstrated capability for high-precision ranging and 3D imaging.

    Conclusions:

    • The dual SPADs LiDAR system with a reference optical path successfully overcomes ranging errors.
    • This technology enables accurate 3D imaging and precise distance measurements in challenging conditions.
    • The system offers a significant advancement for applications requiring high-fidelity LiDAR performance.