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    This study introduces a new, stable method for calibrating spatial light modulators (SLMs). The technique ensures accurate phase measurements, even with vibrations, improving performance in optical systems.

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    Area of Science:

    • Optical Engineering
    • Metrology
    • Photonics

    Background:

    • Spatial Light Modulators (SLMs) are crucial optical components.
    • Accurate phase calibration of SLMs is essential for advanced optical applications.
    • Existing calibration methods often suffer from environmental instability and intensity errors.

    Purpose of the Study:

    • To develop a vibration-insensitive, single-shot phase-calibration method for phase-only SLMs.
    • To enhance the accuracy and stability of SLM phase measurements.
    • To overcome limitations of current diffraction-based and intensity-based calibration techniques.

    Main Methods:

    • Utilized a geometric phase lens to create a phase-shifting radial shearing interferometer.
    • Employed common-path measurements for enhanced environmental stability.
    • Implemented a single-shot measurement for improved efficiency.

    Main Results:

    • The proposed method demonstrated robustness against intensity errors and misalignment.
    • Achieved high environmental stability, surpassing two-beam interferometers.
    • Provided phase uncertainty routinely in the order of 2π/100.
    • Experimental results showed significantly higher accuracy compared to diffraction-based approaches.

    Conclusions:

    • The developed technique offers a superior approach for SLM phase calibration.
    • The method's vibration insensitivity and high accuracy make it suitable for demanding optical systems.
    • This advancement contributes to more reliable and precise optical system performance.