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Compact Lens-less Digital Holographic Microscope for MEMS Inspection and Characterization
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Multiplexed digital holography for fluid surface profilometry.

Vitor S Barroso, August Geelmuyden, Sreelekshmi C Ajithkumar

    Applied Optics
    |October 19, 2023
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    Summary
    This summary is machine-generated.

    Digital holography (DH) offers a new method for measuring fluid surfaces. This technique reconstructs fluid shapes and tracks dynamic surface changes like waves and evaporation.

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    Area of Science:

    • Physics
    • Materials Science
    • Fluid Dynamics

    Background:

    • Digital holography (DH) is established for microstructure imaging.
    • DH captures light wavefronts for quantitative shape and deformation measurements.
    • DH applications in fluid profilometry are limited.

    Purpose of the Study:

    • To present an alternative DH setup for fluid surface measurement.
    • To demonstrate DH reflectometry for fluid profilometry.
    • To explore DH for monitoring dynamic fluid surface changes.

    Main Methods:

    • Utilizing DH reflectometry with multiple reflections.
    • Interfering sample and reference beams to generate multiple holograms.
    • Isolating interferograms in the spatial frequency domain for reconstruction.

    Main Results:

    • Digital reconstruction of fluid surfaces from isolated interferograms.
    • Successful monitoring of fluid surface changes over time.
    • Demonstration of tracking wave formation and evaporation dynamics.

    Conclusions:

    • DH is a viable technique for fluid surface profilometry.
    • The proposed DH reflectometry method enables quantitative surface analysis.
    • DH can monitor dynamic processes on fluid surfaces non-destructively.