Auto-stereoscopic display using hologram screen characterized by small hue change

Abstract

A object behind a screen is clearly observed by using a transparent hologram screen. Because a hologram screen is a diffractive optical element, the screen doesn't affect transmission light. And a hologram screen acts as a directional screen. Auto-stereoscopic display is realized when two stereoscopic images are projected on the directional screen. But a diffraction angle of hologram varies with wavelength of light. When an observer moves a viewing point vertically, 3D images change hue by the difference of diffraction angle with color. We represent a solution of the change.