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Related Experiment Video

Updated: Jun 12, 2026

Universal Hand-held Three-dimensional Optoacoustic Imaging Probe for Deep Tissue Human Angiography and Functional Preclinical Studies in Real Time
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Omnidirectional mid-air imaging with a single biconical-ended cylinder array plate.

Junpei Sano, Naoya Koizumi

    Optics Express
    |June 11, 2026
    PubMed
    Summary

    We developed a novel optical element, the biconical-ended cylinder array plate (BCAP), for augmented reality (AR) mid-air imaging. This BCAP offers ghost-free, omnidirectional viewing without specialized devices.

    Area of Science:

    • Optics and Photonics
    • Augmented Reality Displays
    • Free-Space Imaging

    Background:

    • Mid-air imaging allows multiple users to view virtual content without devices.
    • Conventional methods like micro-mirror array plates (MMAP) have limited viewing angles and ghosting issues.

    Purpose of the Study:

    • To propose and analyze a new optical element, the biconical-ended cylinder array plate (BCAP), for improved mid-air imaging.
    • To achieve omnidirectional observability and ghost image suppression.

    Main Methods:

    • Physically based rendering simulations with parameter sweeps.
    • Image quality evaluation using PSNR, SSIM, LPIPS, and MTF50.
    • Experimental validation using a 3D-printed prototype and comparison with MMAP.

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    Last Updated: Jun 12, 2026

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    Main Results:

    • The BCAP design enables ghost-free, omnidirectional (360°) azimuthal visibility.
    • Favorable ranges for cone apex angle and cylinder height were identified through simulations.
    • Experimental results confirmed omnidirectional viewing and ghost suppression, with a slight sharpness reduction compared to MMAP.

    Conclusions:

    • The BCAP is a promising optical element for ghost-free, omnidirectional mid-air imaging applications.
    • It overcomes limitations of conventional designs, offering a wider viewing range.
    • Further optimization may enhance image sharpness for specific AR applications.