Patent ID: 7448755

Claim:
A projection display apparatus comprising: a light source for emitting white light; a first color separating optical system for reflecting blue light and passing green light and red light from the white light emitted from said light source; a second color separating optical system for reflecting the green light and passing the red light from the green light and the red light which have passed through said first color separating optical system; a first modulator which modulates the blue light reflected by said first color separating optical system; a second modulator which modulates the green light reflected by said second color separating optical system; a third modulator which modulates the red light having passed through said second color separating optical system; a color combining optical system for combining the blue light, the green light, and the red light which have been modulated by said first modulator, said second modulator, and said third modulator, respectively; a first lens disposed in a blue light path between said first color separating optical system and said first modulator; and a second lens disposed in a green light path between said second color separating optical system and said second modulator; wherein a distance between said first lens and said modulator in the blue light path is shorter than a distance between said second lens and said second modulator in the green light path.