<title>Helmet-mounted area of interest</title>

A novel simulator display system is described. The display consists of a full field of view rear screen projection display and a narrow field of view high resolution helmet-mounted display (HMD). The HMD is worn by the pilot within the projection display. The virtual image of the HMD is thus superimposed upon the real image of the projection display. This hybrid approach to building a wide field of view display takes advantage of the beneficial aspects of both projection displays and HMDs. The result is a low cost total field of view display with high resolution. Several system design problems arise in the integration of the HMDwith the projection display. These issues are discussed, and include: the design of an HMD eyepiece with minimal obtrusiveness, visual blending of the HMD imagery with the projected imagery, and timing and perspective issues relating to the computer generated imagery presented by both the HMD and the projection display.