Patent ID: 9568817
Date: 2017-02-14
CPC Classifications: G03B,H04N

Claim:
1. An illumination apparatus comprising: a light source apparatus that outputs a first light beam, a second light beam, and a third light beam; an afocal system on which the first light beam, the second light beam, and the third light beam are incident; a first fly-eye lens provided in a position downstream of the afocal system; a second fly-eye lens provided in a position downstream of the first fly-eye lens; a light convergence system provided in a position downstream of the second fly-eye lens; and a phosphor layer which is provided in a position downstream of the light convergence system and on which the first light beam, the second light beam, and the third light beam are incident via the light convergence system, wherein a ratio R is defined to be a ratio between the distance between the first light beam and the second light beam and the distance between the first light beam and the third light beam, the afocal system is so configured that the ratio R on the light exiting side of the afocal system differs from the ratio R on the light incident side of the afocal system, and the afocal system includes a convex lens having an aspherical surface.