Patent ID: 6942347

Claim:
An image display apparatus comprising: a first image modulation means; a second image modulation means; a color combining optical system which combines a light of a first wavelength area emitted from said first image modulation means and a light of a second wavelength area emitted from said second image modulation means; a first lens having positive power arranged between said first image modulation means and said color combining optical system; and a second lens having positive power arranged between said second image modulation means and said color combining optical system; said color combining optical system including: a color combining prism including a plurality of prisms cemented to one another; and a dichroic film which combines the light of said first wavelength area and the light of said second wavelength area by reflecting the light of said first wavelength area and transmitting the light of said second wavelength area; wherein an optical thickness of said dichroic film increases to other end from the end along slant direction to incident optical axis of the light of said first wavelength area, and wherein said dichroic film is formed on interfaces between two prisms in a plurality of prisms.