Abstract

A retro reflective imaging element has been proposed for an aerial image display system [1]. This type of aerial imaging display system has an advantage that there is no image distortion by Seidel’s aberration. However, the proposed imaging element is expensive to produce. On the other hand, heterogeneous imaging based on retro reflection, which forms an aerial real image in a crosswise direction and a virtual image in a lengthwise direction, has been introduced [2] by Maekawa et al. This imaging can be a low cost solution to an aerial image display for limited application. However, the aerial image is tilted and stretched.

© 2014 Japan Society of Applied Physics, Optical Society of America