Aerial 3D display by use of a 3D-shaped screen with aerial imaging by retro-reflection (AIRR)

Nao Kurokawa; Shusei Ito; Hirotsugu Yamamoto

doi:10.1117/12.2269494

26 June 2017 Aerial 3D display by use of a 3D-shaped screen with aerial imaging by retro-reflection (AIRR)

Nao Kurokawa, Shusei Ito, Hirotsugu Yamamoto

Proceedings Volume 10335, Digital Optical Technologies 2017; 103351K (2017) https://doi.org/10.1117/12.2269494
Event: SPIE Digital Optical Technologies, 2017, Munich, Germany

Abstract

The purpose of this paper is to realize an aerial 3D display. We design optical system that employs a projector below a retro-reflector and a 3D-shaped screen. A floating 3D image is formed with aerial imaging by retro-reflection (AIRR). Our proposed system is composed of a 3D-shaped screen, a projector, a quarter-wave retarder, a retro-reflector, and a reflective polarizer. Because AIRR forms aerial images that are plane-symmetric of the light sources regarding the reflective polarizer, the shape of the 3D screen is inverted from a desired aerial 3D image. In order to expand viewing angle, the 3D-shaped screen is surrounded by a retro-reflector. In order to separate the aerial image from reflected lights on the retro- reflector surface, the retro-reflector is tilted by 30 degrees. A projector is located below the retro-reflector at the same height of the 3D-shaped screen. The optical axis of the projector is orthogonal to the 3D-shaped screen. Scattered light on the 3D-shaped screen forms the aerial 3D image. In order to demonstrate the proposed optical design, a corner-cube-shaped screen is used for the 3D-shaped screen. Thus, the aerial 3D image is a cube that is floating above the reflective polarizer. For example, an aerial green cube is formed by projecting a calculated image on the 3D-shaped screen. The green cube image is digitally inverted in depth by our developed software. Thus, we have succeeded in forming aerial 3D image with our designed optical system.

Citation Download Citation

Nao Kurokawa, Shusei Ito, and Hirotsugu Yamamoto "Aerial 3D display by use of a 3D-shaped screen with aerial imaging by retro-reflection (AIRR)", Proc. SPIE 10335, Digital Optical Technologies 2017, 103351K (26 June 2017); https://doi.org/10.1117/12.2269494

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