Patent ID: 7210797

Claim:
A projector optical unit for projecting an image onto a screen while magnifying a size of the image to be projected with respect to an original size of the image displayed by an image forming element, comprising, a group of lenses for magnifying the size of the image with respect to the original size thereof, and an optical path extending from the image forming element to the screen to transmit the image along the optical path, wherein the group of lenses includes a first part group of lenses for magnifying the size of the image to a first size enlarged with respect to the original size, and a second part group of lenses for further magnifying the size of the image to a second size enlarged with respect to the first size, and wherein an optical axis of the second part group of lenses is operable to be de-centered from a radially central position of the image of the first size corresponding to a radially central position of the image to be projected on the screen.