title: Compact multi-projection 3D display system with light-guide projection.
abstract: We propose a compact multi-projection based multi-view 3D display system using an optical light-guide, and perform an analysis of the characteristics of the image for distortion compensation via an optically equivalent model of the light-guide. The projected image traveling through the light-guide experiences multiple total internal reflections at the interface. As a result, the projection distance in the horizontal direction is effectively reduced to the thickness of the light-guide, and the projection part of the multi-projection based multi-view 3D display system is minimized. In addition, we deduce an equivalent model of such a light-guide to simplify the analysis of the image distortion in the light-guide. From the equivalent model, the focus of the image is adjusted, and pre-distorted images for each projection unit are calculated by two-step image rectification in air and the material. The distortion-compensated view images are represented on the exit surface of the light-guide when the light-guide is located in the intended position. Viewing zones are generated by combining the light-guide projection system, a vertical diffuser, and a Fresnel lens. The feasibility of the proposed method is experimentally verified and a ten-view 3D display system with a minimized structure is implemented.
authors.forename: Chang-Kun
authors.initials: CK
authors.lastname: Lee
authors.forename: Soon-gi
authors.initials: SG
authors.lastname: Park
authors.forename: Seokil
authors.initials: S
authors.lastname: Moon
authors.forename: Jong-Young
authors.initials: JY
authors.lastname: Hong
authors.forename: Byoungho
authors.initials: B
authors.lastname: Lee