23-6 Viewing angle of LED aerial imaging by retroreflection (AIRR) : Relationship between angle of retroreflective sheeting and luminance of LED aerial image

Abstract

We have proposed Aerial Imaging by Retro-Reflection (AIRR). To investigate the viewing angle difference between the retroreflective elements, we measure the luminance distributions of an aerial image along the rotation angle of retroreflective sheeting. The micro-beads type forms the aerial image in significantly wider ranges than the prism type.