Optical projection system for an image display apparatus

摘要

An optical projection system (150) includes a relay lens group (110) to produce an intermediate image from an image created by a display (100) having a first distortion, a projection lens group (130) to enlarge and project the intermediate image that passes through the relay lens group (110), while generating a second distortion in the projected image, and a reflector (140) to reflect the image enlarged by the projection lens group (130) onto a screen (S) to produce a final image having a wide viewing angle. The relay lens group (110) and projection lens group (130) are configured so that the first and second distortions compensate for a third distortion caused by the reflector (140). The use of a reflector (140) facilitates the provision of an image display apparatus of a slim design, while the generation of the "pre-distortions" can ensure that the final image is of high quality.