Patent ID: 6478430
Filing Date: 2002-11-12
Classification: G02B,H04N

Abstract:
An illumination apparatus for illuminating a surface to be illuminated with a light beam from a light source means, said apparatus comprising:secondary light source forming means for forming a plurality of secondary light sources using the light beam from the light source means; a color separation system for color-separating light beams from the secondary light source forming means into three light beams having different wavelength regions from one another; an optical system for forming, at a position closer to the surface to be illuminated than said color separation system, a conjugate plane conjugate to an incident surface of said secondary light source forming means or a plane in the vicinity thereof; and a relay optical system disposed in at least one optical path of the three light beams color-separated by said color separation system, wherein the conjugate plane conjugate to the incident surface of said secondary light source forming means or the plane in the vicinity thereof, formed on the optical path on which said relay optical system is disposed by means of said relay optical system is a curved plane, and a paraxial image plane of the conjugate plane formed by said relay optical system is located at a position shifted from the surface to be illuminated.