ILLUMINATION SYSTEM AND PROJECTOR ADOPTING THE SAME

摘要

PROBLEM TO BE SOLVED: To provide an illumination system capable of realizing color images without a color wheel and to provide a projector adopting it.

SOLUTION: The illumination system includes an illumination unit including a light emitting element 10a for emitting a light beam having a predetermined wavelength and holographic optical elements 15 and 18 for reducing a cross section of the light beam emitted from the light emitting element, and a first optical path changer 20 for changing a proceeding path of an incident light passing through the holographic optical elements. The projector includes the illumination unit comprising the light emitting element for emitting the light beam having the predetermined wavelength and the holographic optical elements for reducing the cross section of the light beam emitted from the light emitting element, the first optical path changer for changing the proceeding path of the incident light inputted through the holographic optical elements, a display element for forming an image by processing the light beam inputted from the first optical path changer according to an input video signal, and a projection lens unit for magnifying the image formed by the display element and projecting the magnified image toward a screen.

COPYRIGHT: (C)2003,JPO