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    This study introduces a novel technique using a Cyclic Shear Interferometer (CSI) to generate phase-shifted interferograms for direct phase derivative mapping. This vibration-immune method enhances optical phase data acquisition for dynamic samples.

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    Area of Science:

    • Optical physics
    • Interferometry
    • Microscopy

    Background:

    • Traditional interferometry is susceptible to environmental noise like vibrations and temperature fluctuations.
    • Obtaining derivative phase maps often requires complex post-processing or specialized setups.

    Purpose of the Study:

    • To develop a robust technique for generating phase-shifted interferograms.
    • To directly acquire derivative phase data maps immune to environmental disturbances.
    • To process optical phase data for dynamic microscopic samples.

    Main Methods:

    • Utilized a Cyclic Shear Interferometer (CSI) combined with a polarizing splitter to generate two parallel interferograms with π/2 phase shifts.
    • Leveraged the common path configuration of the CSI for inherent immunity to vibrations and temperature changes.
    • Employed the Vargas-Quiroga algorithm for processing the generated interferograms to obtain the optical phase data map.

    Main Results:

    • Successfully generated two parallel interferograms with the desired phase shifts.
    • Directly obtained derivative phase data maps due to the CSI configuration.
    • Demonstrated the technique's insensitivity to vibrations and temperature.
    • Presented experimental results for dynamic microscopic transparent samples.

    Conclusions:

    • The presented technique offers a vibration-insensitive and temperature-stable method for acquiring derivative phase data.
    • The combination of CSI and a polarizing splitter provides a direct route to phase derivative mapping.
    • This method is suitable for analyzing dynamic microscopic transparent samples effectively.