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    Area of Science:

    • Biomedical Optics
    • Optical Imaging
    • Microscopy

    Background:

    • Full-field swept-source optical coherence microscopy (FF-SSOCM) typically requires mechanical scanning for 3D imaging.
    • Low spatial coherence illumination can introduce blurring effects due to defocus in FF-SSOCM.
    • Achieving coherent-noise-free imaging without scanning is a significant challenge in optical microscopy.

    Purpose of the Study:

    • To develop and demonstrate a novel 3D imaging technique combining FF-SSOCM with low spatial coherence illumination.
    • To overcome the limitations of mechanical scanning and coherent noise in FF-SSOCM.
    • To enable numerically focused, coherent-noise-free imaging without physical sample or optical element movement.

    Main Methods:

    • Integration of full-field swept-source optical coherence microscopy (FF-SSOCM) with low spatial coherence illumination.
    • Application of specialized numerical processing algorithms to correct for defocus-induced blurring.
    • Development and utilization of a custom FF-SSOCM system for experimental validation.

    Main Results:

    • Demonstration of numerically focused imaging without mechanical scanning in any direction.
    • Successful correction of blurring effects caused by defocus, even with low spatial coherence.
    • Achieved coherent-noise-free 3D imaging of samples with longitudinal extents exceeding the optical depth of field.

    Conclusions:

    • The proposed technique effectively enables coherent-noise-free 3D imaging using FF-SSOCM without mechanical scanning.
    • Numerical processing is a viable method to correct defocusing and enhance image quality in low spatial coherence FF-SSOCM.
    • This advancement offers a new, efficient approach for high-resolution 3D imaging in various scientific applications.