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    A novel interferometer provides direct derivative phase imaging with enhanced stability. This Double Cyclic Shear Interferometer (DCSI) captures phase data in a single shot, improving quantitative phase imaging for microscopic samples.

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    Area of Science:

    • Optical Physics
    • Interferometry
    • Quantitative Phase Imaging

    Background:

    • Traditional interferometers face stability challenges.
    • Quantitative phase imaging requires precise phase retrieval.
    • Existing methods can be complex and sensitive to environmental factors.

    Purpose of the Study:

    • To propose a new parallel two-step polarizing phase shifting interferometer.
    • To achieve direct retrieval of derivative phase data maps.
    • To enhance stability and simplify quantitative phase imaging.

    Main Methods:

    • Utilizing a Double Cyclic Shear Interferometer (DCSI) configuration.
    • Generating two π-shifted interferograms in a single CCD camera shot.
    • Employing a half-wave plate retarder for controlled phase shifts (π/2).
    • Processing data using a four-step phase-shifting algorithm.

    Main Results:

    • The DCSI system directly retrieves derivative phase data.
    • The interferometer demonstrates superior stability compared to other configurations.
    • Successful quantitative phase imaging of microscopic transparent samples was achieved.
    • The system allows for adjustable separation of interferograms.

    Conclusions:

    • The proposed DCSI-based interferometer is effective for quantitative phase imaging.
    • The single-shot, two-step approach enhances stability and efficiency.
    • This method offers a robust solution for microscopic phase analysis.