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Related Experiment Video

Updated: Feb 19, 2026

Multimodal Volumetric Retinal Imaging by Oblique Scanning Laser Ophthalmoscopy oSLO and Optical Coherence Tomography OCT
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Off-axis reference beam for full-field swept-source OCT and holoscopy.

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    Fourier-domain optical coherence tomography (FD-OCT) is enhanced by a new parallel full-field imaging method. This technique doubles imaging depth and eliminates noise, enabling detailed visualization of biological tissues like the human retina.

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    Area of Science:

    • Biomedical Optics
    • Optical Imaging
    • Medical Diagnostics

    Background:

    • Fourier-domain optical coherence tomography (FD-OCT) faces limitations including restricted imaging depth, limited focal range, and autocorrelation noise.
    • These limitations hinder the effectiveness of FD-OCT in various critical applications.

    Purpose of the Study:

    • To introduce a novel parallel full-field FD-OCT imaging method to overcome existing limitations.
    • To enhance imaging depth, eliminate artifacts, and extend the focal range for improved OCT performance.

    Main Methods:

    • A swept laser source and area camera were employed with an off-axis reference beam at a small angle.
    • Digital off-axis holography principles were used to separate signals in Fourier space.
    • Signal term reconstruction, inverse scattering, and holoscopy were applied for numerical focal range extension.

    Main Results:

    • The proposed method achieves full-range imaging, effectively doubling the imaging depth.
    • Autocorrelation artifacts were successfully removed, improving image clarity.
    • Extended measurement depth was demonstrated by imaging a porcine eye, and in vivo imaging of the human retina was feasible.

    Conclusions:

    • The developed parallel full-field FD-OCT method significantly enhances imaging depth and removes artifacts.
    • This technique offers a promising solution for high-resolution, deep-tissue imaging in biological and medical applications.
    • The feasibility of in vivo imaging of the human retina highlights its clinical potential.