An infinity image visual display system comprising an input image source, a concave projection mirror, a concave eyepiece mirror and a single path-folding beamsplitter. The projection mirror images the input image source at the focal surface of the eyepiece mirror, which image is reflected by the eyepiece...http://www.google.fr/patents/US4383740?utm_source=gb-gplus-shareBrevet US4383740 - Infinity image visual display system
