Mr. Masahiko Yasui Profile

Masahiko Yasui

at Univ of Tokyo

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Proceedings Article | 26 February 2020 Presentation + Paper

Projection-type integral 3D display using mirrors facing each other for a wide viewing angle with a downsized system

Masahiko Yasui, Yoshihiro Watanabe, Masatoshi Ishikawa

Proceedings Volume 11304, 1130406 (2020) https://doi.org/10.1117/12.2542531

KEYWORDS: Mirrors, Projection systems, 3D displays, 3D image processing, Staring arrays, Reflection, Ray tracing, Cameras

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In this work, we aim to realize a wide viewing-angle and a space saving configuration in a projection-type integral 3D display composed of a projector and lens array. In the conventional method, for a wide viewing-angle, light rays should be incident on the lens array at a large incident angle. In order to achieve a large incident angle, projectors are installed diagonally behind the lens array. This requires a large space for projectors behind the display. We propose a projection method that realizes a wide viewing-angle using a space saving configuration in which one projector is installed behind the lens array. In the proposed configuration, two mirrors are arranged facing each other between the projector and the lens array. Light rays enter the lens array from the mirror image positions of the projector through multiple reflections between these two mirrors. The proposed method requires no projector other than the projector installed directly behind the lens array. In this way, wide viewing angle is achieved with a downsized system. First, the proposed configuration was simulated and its feasibility was evaluated. Second, based on the simulation results, the specifications of the proposed configuration were evaluated in the experiment. The actual display system was then prepared for the experiment. As a result of the simulation and experiment, a viewing-angle that requires a configuration employing three or more projectors was realized using a configuration employing one projector.

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