Patent ID: 8491131

Claim:
A projector comprising: a first light source section having a first arc tube and a first concave mirror and adapted to emit a first light beam; a second light source section having a second arc tube and a second concave mirror and adapted to emit a second light beam; a light combining section adapted to combine the first light beam and the second light beam; an adjustment device adapted to adjust a light path of the first light beam and a light path of the second light beam, respectively, in two steps; an homogenizing optical system adapted to equalize the first light beam and the second light beam processed by the light combining section; a light modulation section adapted to modulate the light beam from the homogenizing optical system in accordance with image information; a third mirror and a fourth mirror that guide both the first light beam and the second light beam to the homogenizing optical system, the third mirror and the fourth mirror being fixed mirrors; and a projection optical system adapted to project an image beam processed by the light modulation section, wherein the first concave mirror of the first light source section converges a light beam emitted from the first arc tube, the second concave mirror of the second light source section converges a light beam emitted from the second arc tube, the light combining section is provided with at least one mirror on each of an illumination path between the first light source section and the homogenizing optical system and an illumination path between the second light source section and the homogenizing optical system, and the adjustment device individually displaces the first light source section and the second light source section in a predetermined direction in the plane of perpendicular to respective system optical axes, and changes an angle, at which respective one of the light paths is folded by the at least one mirror, thereby adjusting arrangement of the light paths.