The invention provides an illumination system for a head-mounted display. The illumination system includes a plurality of illuminators which irradiate light over an area. The area has a central region where the light has a selective intensity, and outer regions on opposing sides of the central regions...http://www.google.de/patents/US20020027779?utm_source=gb-gplus-sharePatent US20020027779 - Image generator having an improved illumination system
