Hyperboloidal reflection for full-parallax multi-view 3D display observable from all directions

Yusuke Sando; Yutaro Goto; Makoto Kawamura

doi:10.1117/12.3016584

18 June 2024 Hyperboloidal reflection for full-parallax multi-view 3D display observable from all directions

Yusuke Sando, Yutaro Goto, Makoto Kawamura

Proceedings Volume 12998, Optics, Photonics, and Digital Technologies for Imaging Applications VIII; 129981B (2024) https://doi.org/10.1117/12.3016584
Event: SPIE Photonics Europe, 2024, Strasbourg, France

Conference Poster

Abstract

To realize three-dimensional (3D) displays observable from all directions, we propose utilizing a hyperboloidal mirror to reflect light in all directions. The hyperboloidal mirror has two focal points in imaging relation. Thus, an image displayed near one focal point is reconstructed as a virtual image near the other focal point after the hyperboloidal mirror reflection. Owing to the geometrical property of the hyperboloidal mirror, the diverging angle of the reflected light can be much larger than that of conventional planar displays. However, there is a problem that the imaging magnification ratio depends on the propagation direction. This is one reason for distortion in hyperboloidal mirror imaging, and must be solved appropriately. This paper proposes a technical method to overcome the above distortion depending on the propagation direction by multi-view-based integral imaging. In integral imaging, the propagation direction of each elemental image is optically limited; therefore, the magnification ratio can be regarded as approximately constant within each propagation. Thus, the combination of integral imaging and hyperboloidal mirror reflection enables display of arbitrary multiple images with a very wide viewing zone without specially caring about the distortion. By displaying multiple images with proper parallax corresponding to the propagation directions, a full-parallax multi-view-based 3D display can be realized. In this study, a large hyperboloidal mirror with a diameter of 15 cm was used, and a 3D display with the horizontal and vertical viewing zones of 135° and 60°, respectively, has been successfully demonstrated.

Citation Download Citation

Yusuke Sando, Yutaro Goto, and Makoto Kawamura "Hyperboloidal reflection for full-parallax multi-view 3D display observable from all directions", Proc. SPIE 12998, Optics, Photonics, and Digital Technologies for Imaging Applications VIII, 129981B (18 June 2024); https://doi.org/10.1117/12.3016584

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