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    This summary is machine-generated.

    This study introduces a new phase estimation method for digital holographic interferometry. It reliably retrieves phase information in a single shot, even with significant noise, using signal subspace analysis.

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    Area of Science:

    • Optical Metrology
    • Holography
    • Interferometry

    Background:

    • Digital holographic interferometry (DHI) is a powerful technique for measuring phase, crucial for deformation analysis and surface profiling.
    • Accurate phase estimation in DHI is often challenged by noise and the need for multiple fringe patterns.
    • Existing methods may require multiple phase-shifted interferograms, limiting their application in dynamic scenarios.

    Purpose of the Study:

    • To propose a novel, reliable method for phase estimation in digital holographic interferometry.
    • To achieve single-shot phase retrieval capabilities.
    • To demonstrate high robustness against severe noise conditions.

    Main Methods:

    • Local analysis of the interference field signal using a high-resolution signal subspace technique.
    • Application of the proposed method for single-shot phase retrieval.
    • Validation through numerical simulations and experimental fringe pattern analysis.

    Main Results:

    • The proposed method successfully retrieves phase information in a single shot.
    • Demonstrated high robustness and reliability even under severe noise conditions.
    • Validated practical applicability using experimental data from digital holographic interferometry.

    Conclusions:

    • The developed signal subspace technique provides a reliable and robust approach for phase estimation in DHI.
    • Single-shot phase retrieval is achievable, enabling applications in dynamic measurements.
    • The method's performance is confirmed through both simulations and real-world experimental data.