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Highly Resolved Intravital Striped-illumination Microscopy of Germinal Centers
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Isotropic resolution plenoptic background oriented schlieren through dual-view acquisition.

Yulan Liu, Feng Xing, Liwei Su

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    A novel isotropic resolution plenoptic background oriented schlieren (plenoptic BOS) system uses a single camera and a mirror to achieve high-fidelity 3D flow field measurements. This advancement offers accurate volumetric imaging without increased complexity or cost.

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    Area of Science:

    • Fluid Dynamics
    • Optical Measurement Techniques

    Background:

    • High-resolution, large-scale 3D flow field measurements are crucial for understanding fluid mechanisms.
    • Current volumetric methods like tomographic BOS and conventional plenoptic BOS have limitations in system complexity and axial resolution, respectively.

    Purpose of the Study:

    • To introduce and validate a novel isotropic resolution plenoptic background oriented schlieren (ISO plenoptic BOS) system.
    • To demonstrate the system's capability for high-fidelity 3D density field measurements.

    Main Methods:

    • Development of an ISO plenoptic BOS system utilizing a single camera and a strategically placed mirror to capture dual image views.
    • Experimental validation using candle flames, a heat gun, and an underexpanded jet to image induced density fields.

    Main Results:

    • The ISO plenoptic BOS system achieved isotropic spatial resolution with a single camera.
    • Demonstrated higher axial resolution and more accurate 3D density field reconstruction compared to conventional plenoptic BOS.
    • Successfully imaged complex flow phenomena, including thermal plumes and shock waves (Mach disk).

    Conclusions:

    • The proposed ISO plenoptic BOS system provides a cost-effective solution for high-resolution volumetric imaging.
    • This dual-view plenoptic BOS approach overcomes limitations of existing methods, enabling broader applications in aerodynamic imaging.
    • The system facilitates large-scale, high-fidelity fluid dynamics research without additional hardware costs or synchronization challenges.