Patent ID: 7446943

Claim:
An image display apparatus comprising: a display for displaying an original image; and a display optical system for guiding light from the original image to an eye of an observer or a surface to have an image projected thereon, said display optical system comprising: a first optical system including: a first surface that is formed on a transparent body and has at least a reflecting action; a second surface for reflecting the light reflected on said first surface toward said first surface again; and a third surface for transmitting the light from the original image, which is formed on said transparent body, wherein the light transmitted through said third surface travels toward said first surface and is reflected for the first time on said first surface, and a principal ray at central angle of view to be reflected for the last time on said first surface is reflected and travels to a side opposite to a side of the first reflection on said first surface with respect to each normal line of said first surface on each hit point thereof; and a second optical system for guiding the light from the original image to said third surface.