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360-degree tabletop 3D light-field display with ring-shaped viewing range based on aspheric conical lens array.

Xunbo Yu, Xinzhu Sang, Xin Gao

    Optics Express
    |November 2, 2019
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    Summary

    This study presents a 360-degree viewable light-field display using an aspheric conical lens array. This innovative system enhances 3D imaging for multiple viewers arranged in a ring, improving viewpoint density and reducing aliasing.

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    Area of Science:

    • Optics
    • Display Technology
    • Computer Vision

    Background:

    • Traditional light-field displays with standard lens arrays offer limited viewing areas, typically above the screen.
    • This limitation results in wasted viewpoints when observers are positioned around a tabletop display.
    • Developing a 360-degree viewable system is crucial for immersive, multi-user 3D experiences.

    Purpose of the Study:

    • To demonstrate a novel 360-degree viewable light-field display system.
    • To enable multiple viewers positioned in a ring around a tabletop to perceive 3D images.
    • To overcome the limitations of conventional light-field displays regarding viewing area and viewpoint distribution.

    Main Methods:

    • Utilizing a holographic functional screen (HFS) combined with an aspheric conical lens array.
    • Integrating a high-resolution LCD (3840x2160), LED array, and Fresnel lens array.
    • Designing the aspheric conical lens to arrange elemental image viewpoints in a ring-type configuration.
    • Developing a corresponding coding method for the elemental images.

    Main Results:

    • The proposed system successfully generates 360-degree viewable 3D images for viewers in a ring-shaped range.
    • The use of an aspheric conical lens array increases viewpoint density compared to standard lens arrays.
    • The aliasing phenomenon is reduced, leading to improved image quality.
    • Experimental results show high-quality 3D images with accurate perception and occlusion.

    Conclusions:

    • The developed tabletop light-field display based on an aspheric conical lens array provides a 360-degree viewing experience.
    • This system effectively addresses the limitations of traditional displays by optimizing viewpoint distribution.
    • The technology offers a promising solution for multi-user, immersive 3D visualization in various applications.