Patent ID: 7312908
Filing Date: 2007-12-25
Classification: G03H

Abstract:
1. A 3D image display apparatus for making illumination light components of multiple wavelengths incident to a hologram, thereby generating reproduced light components of the wavelengths from the hologram, and displaying a 3D image based on these reproduced light components, said apparatus comprising: a spatial light modulator having a discrete pixel structure for presenting holograms associated with the respective wavelengths; an illumination optical system for converting each of the illumination light components of the wavelengths into a parallel plane wave and making the parallel plane waves incident from mutually different incident directions to said spatial light modulator; a reproduced image transforming optical system for subjecting each of reproduced images of the wavelengths generated from the holograms presented on said spatial light modulator, to wavefront transformation into a virtual image or a real image; and a mask with an aperture provided on a focal plane of said reproduced image transforming optical system, wherein said illumination optical system sets the incident directions of the respective illumination light components of the wavelengths to said spatial light modulator so that diffracted waves of any order of the respective reproduced light components of the wavelengths are superimposed on each other in said aperture after the wavefront transformation by said reproduced image transforming optical system.