Disclosed is a stereoscopic projection system for viewing from an eye station a stereoscopic image composed of a 1 x magnification of an image source pair. Said system comprises a pair of image sources each having an image center which are spaced apart from each other; a concave spherical mirror segment...http://www.google.com.tw/patents/US4799763?utm_source=gb-gplus-share專利 US4799763 - Paraxial stereoscopic projection system
