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Spatio-temporal scanning modality for synthesizing interferograms and digital holograms.

V Bianco, M Paturzo, P Ferraro

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    This study introduces a novel scanning method using object movement to create synthetic interferograms for enhanced imaging. This technique offers an extended field of view and better noise contrast, aiding quantitative phase retrieval.

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    Area of Science:

    • Optical Imaging
    • Holography
    • Phase Contrast Microscopy

    Background:

    • Traditional interferometry often requires precise phase-shifting mechanisms.
    • Achieving extended fields of view and high contrast can be challenging in digital holography.

    Purpose of the Study:

    • To develop a spatio-temporal scanning method for synthesizing interferograms and digital holograms.
    • To leverage object movement for intrinsic phase-shifting and improved imaging characteristics.

    Main Methods:

    • Utilizing a single-pixel row for scanning to build synthetic interferograms.
    • Exploiting object motion to introduce phase shifts between successive recordings.
    • Theoretical formulation and experimental validation of the scanning process.

    Main Results:

    • Demonstrated synthesis of interferograms with an extended field of view.
    • Achieved improved noise contrast compared to conventional methods.
    • Successfully performed quantitative phase retrieval using the intrinsic phase-shifting procedure.

    Conclusions:

    • The proposed spatio-temporal scanning method offers an effective alternative for generating synthetic interferograms.
    • This technique is particularly advantageous for systems with inherent object movement, such as microfluidics.
    • Enables quantitative phase retrieval with enhanced imaging performance.