Abstract: In order to widen the field-of-view, two display devices are abutted. A first display device has a concave mirror (10), a 45.degree. beam splitter (12) and a CRT positioned on an axis (16). To minimize any gap tending to develop between adjacent images, a second display device is rotated 90.degree. about its viewing axis (24), the second display device having a concave mirror (20), a beam splitter (22) and a CRT (21). The CRT axis (26) is tilted towards the mirror (20) to provide image continuity where the devices abut, so that eye movement within a range to an observer's right of the center of curvature (18) is possible without any gap developing between two displayed images. In a modification, the mirror (20) has a larger radius of curvature and overlaps the mirror (10). In an alternative arrangement, there is no 90.degree. rotation of the second display device, but the CRT axes are tilted towards each other.