Patent ID: 6871963

Claim:
A projector that projects an image, comprising: an illumination optical system transmitting illumination light of a plurality of sub light beams; a color light separation optical system that separates the illumination light that has exited from the illumination optical system into illumination light beams of a plurality of colors; a plurality of electro-optical devices that convert the illumination light beams of a plurality of colors into light beams that correspond to color signals that correspond to the respective illumination light beams of a plurality of colors, each of the illumination light beams of a plurality of colors having a plurality of sub light beams superimposed on the respective electro-optical device; a color light synthesizing optical system that synthesizes the converted light beams of a plurality of colors that exit from the plurality of electro-optical devices in order to cause a light beam that represents a color image to exit therefrom; a projection optical system that projects the color image that is represented by the synthesized light beam that exits from the color light synthesizing optical system; and a relay optical system that is provided in a path of at least one color illumination light beam of the illumination light beams of a plurality of colors that have exited from the color light separation optical system, the relay optical system including three lenses that are aligned along a direction of an optical axis thereof, at least two of the three lenses of the relay optical system being adjustable in an optical axis direction, thereby the color illumination light beam that passes through the respective one of the at least two of the three lenses is independently adjusted among the illumination light beams of a plurality of colors.