Patent ID: 7066600

Claim:
A projection type image display apparatus, comprising: a light source; an integrator; a first dichroic mirror which transmits a first color light and reflects second and third color lights; a first reflection image display device for the first color from the first dichroic mirror; a second reflection image display device for the second color; a third reflection image display device for the third color; a dichroic prism for combining the first, second and third color lights from the first, second and third reflection image display devices; a projection lens; a first reflection polarizing plate located before or after the first reflection image display device on a first light path, the first light path being from the first dichroic mirror to the projection lens via the first reflection image display device, the first reflection polarizing plate comprising a working surface which rotates the first light reflected by the first reflection image display device in a specific direction; a first auxiliary polarizer located between the light source and the first reflection polarizing plate on the first light path; a first auxiliary analyzer as an absorption polarizing plate located between the first reflection polarizing plate and the projection lens; and a first relay lens located on the first path for refocusing an image formed by the integrator.