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Related Experiment Video

Updated: Oct 12, 2025

Digital Inline Holographic Microscopy DIHM of Weakly-scattering Subjects
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Dynamic displacement measurement in digital holographic interferometry using eigenspace analysis.

Jagadesh Ramaiah, Rajshekhar Gannavarpu

    Applied Optics
    |November 22, 2021
    PubMed
    Summary
    This summary is machine-generated.

    This study presents a robust phase retrieval method for non-contact displacement measurement using digital holographic interferometry. The technique enhances accuracy in noisy conditions for dynamic deformation analysis.

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    Area of Science:

    • Optics and Photonics
    • Metrology
    • Materials Science

    Background:

    • Non-contact displacement measurement is crucial in digital holographic interferometry.
    • Accurate interference phase estimation is challenging under severe noise conditions.

    Purpose of the Study:

    • To develop a robust phase retrieval method for non-contact displacement testing.
    • To improve the reliability of measurements in digital holographic interferometry, especially in noisy environments.

    Main Methods:

    • Eigenspace processing of the complex interference field signal.
    • Application of the method to digital holographic interferometry for phase retrieval.

    Main Results:

    • The proposed method demonstrates effective phase retrieval under severe noise conditions, as shown by simulation results.
    • Successful demonstration of practical utility for dynamic deformation analysis using experimental data.

    Conclusions:

    • The developed eigenspace-based method provides a robust solution for phase retrieval in digital holographic interferometry.
    • This approach enhances the capability for accurate non-contact displacement measurements in challenging, noisy environments.