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Updated: Sep 11, 2025

Compact Lens-less Digital Holographic Microscope for MEMS Inspection and Characterization
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Portable low-coherence digital holographic microscope.

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    This summary is machine-generated.

    We developed a stable, compact digital holographic microscope using an LED and a cube beam splitter. This vibration-insensitive system achieves single-shot phase reconstruction, ideal for portable, dynamic imaging applications.

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    Area of Science:

    • Optics and Photonics
    • Microscopy Techniques
    • Digital Holography

    Background:

    • Traditional holographic microscopy setups can be bulky and sensitive to environmental vibrations.
    • Achieving high-stability, real-time phase reconstruction remains a challenge for portable microscopy.
    • Minimizing parasitic interference and coherent noise is crucial for accurate holographic imaging.

    Purpose of the Study:

    • To present a compact, portable, and vibration-insensitive digital holographic microscopy setup.
    • To demonstrate single-shot phase reconstruction for dynamic inspection.
    • To validate the system's performance in a challenging environment.

    Main Methods:

    • Utilized a slightly off-axis configuration for digital holographic microscopy.
    • Employed a monolithic structure with a minimal number of optical elements for enhanced stability.
    • Incorporated an LED as the illumination source and a single cube beam splitter interferometer.
    • Implemented a single-shot approach for rapid imaging phase reconstruction.

    Main Results:

    • Achieved a compact and portable digital holographic microscopy system.
    • Demonstrated high stability and insensitivity to vibrations due to the monolithic design.
    • Successfully reduced parasitic interferences and coherent noise using the cube beam splitter.
    • Obtained single-shot imaging phase reconstruction, proving its utility for dynamic processes.
    • Validated the system's robust performance through experimental testing in a harsh environment.

    Conclusions:

    • The presented digital holographic microscopy setup offers a stable, compact, and portable solution.
    • The design's simplicity and use of an LED and cube beam splitter enable efficient and noise-reduced imaging.
    • Single-shot phase reconstruction makes the system highly suitable for real-time monitoring and field applications.
    • Experimental results confirm the system's reliability even under adverse environmental conditions.