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Method of reaching a resolution-controllable micro-angle measurement by using a Michelson interferometer.

Cong She, Li Xu, Xiang-Dong Shan

    Applied Optics
    |October 6, 2021
    PubMed
    Summary

    This study introduces a novel Michelson interferometer method for controllable micro-angle measurement resolution. Adjusting mirror distances allows for easy conversion between multiple measurement resolutions, enhancing precision in small angle measurements.

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    Area of Science:

    • Optics and Photonics
    • Metrology and Measurement Science

    Background:

    • Accurate micro-angle measurement is crucial in various scientific and industrial applications.
    • Existing methods for small angle measurement often lack flexibility in resolution adjustment.

    Purpose of the Study:

    • To propose and demonstrate a novel method for controllable micro-angle measurement resolution.
    • To investigate the relationship between mirror distance and measurement resolution in a Michelson interferometer setup.

    Main Methods:

    • A modified Michelson interferometer configuration was employed.
    • The distance between a pair of parallel mirrors was systematically varied.
    • Micro-angle measurements were performed at different mirror distances to assess resolution.

    Main Results:

    • The proposed method enables controllable resolution for micro-angle measurements.
    • A significant alteration in resolution was observed, ranging from 22.88 µrad to 14.02 µrad as mirror distance changed from 0 to 6 mm.
    • The system demonstrated the ability to achieve multiple measurement resolutions conveniently.

    Conclusions:

    • The novel Michelson interferometer method offers a flexible and convenient approach to micro-angle measurement.
    • This technique provides an easily adjustable resolution, outperforming conventional methods in terms of adaptability.