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    This study introduces a novel microLED-based confocal microscope for 3D profiling without mechanical scanning. This innovative approach enables portable 3D confocal microscopy with enhanced precision.

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    Area of Science:

    • Optics and Photonics
    • Microscopy Technology
    • 3D Imaging

    Background:

    • Confocal microscopy typically requires mechanical scanning and external light sources.
    • Existing methods can be bulky and complex, limiting portability.

    Purpose of the Study:

    • To propose and demonstrate a microLED-based chromatic confocal microscope.
    • To achieve 3D profiling without mechanical scanning or external light sources.

    Main Methods:

    • Utilized a micro-light-emitting diode (microLED) panel as a point source array for lateral scanning.
    • Employed chromatic aberration of an aspherical objective for axial scanning.
    • Implemented a virtual confocal slit technique for improved contrast and depth reconstruction precision.

    Main Results:

    • Successfully demonstrated 3D profiling on a diamond-turned copper sample and onion epidermis.
    • The microLED panel enabled lateral scanning without mechanical movement.
    • The virtual pinhole technique enhanced depth reconstruction accuracy.

    Conclusions:

    • The microLED-based confocal microscope is a viable solution for portable 3D imaging.
    • MicroLED technology shows significant potential for future advancements in confocal microscopy.
    • Further development of microLEDs is recommended for enhanced confocal imaging applications.