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High-accuracy longitudinal position measurement using self-accelerating light.

Shashi Prabhakar, Stephen Z D Plachta, Marco Ornigotti

    Applied Optics
    |May 13, 2021
    PubMed
    Summary
    This summary is machine-generated.

    This study introduces a novel method for high-accuracy distance measurement using spiraling light beams. The technique achieves micrometer precision over a millimeter range with simple detectors, offering stable, high-speed longitudinal position measurements.

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    Area of Science:

    • Optics and Photonics
    • Metrology

    Background:

    • Radially self-accelerating light beams display spiraling intensity patterns during propagation.
    • Accurate distance measurement is crucial in various scientific and industrial applications.

    Purpose of the Study:

    • To demonstrate a high-accuracy distance measurement method using spiraling light beams.
    • To achieve precise longitudinal position sensing over a broad range.

    Main Methods:

    • Utilizing radially self-accelerating light beams with dual-speed spiraling components.
    • Employing simple off-axis intensity detection with quadrant detectors for measurement.
    • Conducting both simulation and experimental validation of the proposed method.

    Main Results:

    • Achieved an accuracy of approximately 2 µm over a longitudinal range exceeding 2 mm.
    • Demonstrated distance measurement using a single beam and two quadrant detectors.
    • Validated the effectiveness of dual-speed spiraling components for broad-range accuracy.

    Conclusions:

    • The developed method offers a stable and intrinsically stable approach for distance measurement.
    • The technique's reliance on single-beam interference and static generation enables high-speed applications.
    • Potential applications include high-speed longitudinal position measurements in various fields.