70‐3: Distinguished Student Paper: Novel Directional Projection Screen using Diverted Curved Surfaces Cube Corner Reflector (D‐CCR)

Abstract

We devised and developed a novel directive projection screen for applications such as personal use, small group meeting, automotive pillar, and near-eye. This screen reflects and diffuses incident light at an angle  view around a direction deviated by  view from the direction of the projector. We realized the screen by employing a hollow cube corner retroreflector (CCR). The bottom surface of the CCR was tilted by  view /2 to change the direction of the reflected light by  view from the retro-reflection direction. Furthermore three side surfaces of the CCR (D-CCR) were curved to diffuse the light within a designed angle ( view ± view /2). We simulated a D-CCR with  view =10° and  view =16°, i.e., the viewing angle for a single D-CCR, 10°±8°, and fabricated a prototype. We verified closely the desired characteristics in which an optical gain of 16 was obtained.