Superimposing 3D display viewable from 360 degrees using light guide

The superimposing 3D display, which can be observed from 360 degrees, can show AR 3D contents to many people with the naked eye. Therefore, this display is expected to be used for advertising and exhibition. In the previous study, the display consisting of a high-speed projector, a diffusion screen and a thin strip mirror is proposed. However, diffuse light that is not reflected by the mirror distracts viewers who observe the 3D image. This problem is solved by using optical elements with the necessary properties for 3D display and not using a diffusion screen. In this paper, we propose a novel 3D display consisting of a specially designed wedge guide and a high-speed projector instead of a diffusion screen and a thin strip mirror. We will confirm that the wedge guide has the necessary properties for 3D display and that the proposed display is able to display 3D images by simulation.