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Related Experiment Video

Updated: Nov 30, 2025

The Generation of Higher-order Laguerre-Gauss Optical Beams for High-precision Interferometry
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Parallel beam generation method for a high-precision roll angle measurement with a long working distance.

Wenran Ren, Jiwen Cui, Jiubin Tan

    Optics Express
    |November 13, 2020
    PubMed
    Summary

    This study introduces a new system for precise roll angle measurement over long distances using two parallel light beams and detectors. Experiments confirm its effectiveness, achieving high accuracy and resolution for demanding applications.

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    Area of Science:

    • Optics and Measurement Science
    • Precision Engineering

    Background:

    • Accurate roll angle measurement is crucial in various engineering fields.
    • Existing methods often face limitations in achieving high precision over long working distances.

    Purpose of the Study:

    • To present a novel measurement system for high-precision roll angle determination.
    • To enable accurate measurements over extended working distances.

    Main Methods:

    • Development of a measurement system comprising a light source and detector components.
    • Utilizing a transmission grating and plane mirror to generate two high-precision parallel beams.
    • Implementing a design to minimize beam nonparallelism caused by installation errors.

    Main Results:

    • Demonstrated effectiveness of the measurement system through experimental validation.
    • Achieved a resolution of 0.5 arcseconds.
    • Attained a measurement accuracy of 1.1 arcseconds.

    Conclusions:

    • The novel system provides a robust solution for high-precision roll angle measurements.
    • The design effectively addresses challenges associated with long working distances and installation errors.
    • The experimental results validate the system's capability for precise angular metrology.