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Compact Lens-less Digital Holographic Microscope for MEMS Inspection and Characterization
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    This summary is machine-generated.

    This study introduces a simplified common-path digital holographic microscopy (DHM) system using a diffraction grating and pinhole. It enhances field of view and spatial resolution for quantitative phase imaging.

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    Area of Science:

    • Optics and Photonics
    • Microscopy Techniques
    • Biomedical Imaging

    Background:

    • Common-path digital holographic microscopy (DHM) offers high temporal stability for 3D quantitative phase imaging.
    • Self-referencing DHM simplifies setups but suffers from reduced field of view (FoV) and limited spatial resolution.
    • Existing solutions for DHM limitations often increase complexity and cost.

    Purpose of the Study:

    • To present a simplified, full-field, self-referencing DHM configuration.
    • To overcome the reduced FoV and spatial resolution limitations of conventional self-referencing DHM.
    • To demonstrate integration with microsphere-assisted microscopy (MAM) for enhanced resolution.

    Main Methods:

    • A novel self-referencing DHM setup utilizing a diffraction grating and a pinhole at the Fourier plane.
    • Spatially filtering the zero-order diffraction to create a clean, sample-free reference beam.
    • Integration with microsphere-assisted microscopy (MAM) for super-resolution imaging.

    Main Results:

    • The system successfully utilizes the entire FoV by filtering residual object information from the reference beam.
    • Achieved enhanced spatial resolution by integrating with MAM, surpassing the diffraction limit.
    • Validated on a standard diffraction grating, demonstrating sub-diffraction-limit feature resolution.

    Conclusions:

    • The simplified self-referencing DHM configuration effectively expands the FoV and improves spatial resolution.
    • Integration with MAM provides a cost-effective method for achieving super-resolution in DHM.
    • This approach offers a promising tool for high-contrast, high-resolution 3D quantitative phase imaging.