Abstract: An alignment system and method for maintaining the alignment of a target projector with another image projector in a simulator system. The target projector system includes a slewable fold mirror to move the target image in azimuth and elevation. A two position beam splitter is arranged so that in a projector operating mode, the beam splitter is positioned out of the target projector image light path, and in a projector maintenance mode, the beam splitter is positioned in the image light path. A photo-sensitive array is positioned relative to the beam splitter such that light from the display screen is redirected from the light path onto the array. During the maintenance mode, reference light points are generated on the display screen, and the target projector is precisely aligned by use of processing the images captured by the array to calculate an error signal representing the distance between the light point image and the center of the array.

Abstract: A near-infinity image display system (10) has a convex faceplate cathode ray tube (12) positioned with respect to a concave mirror (14) such that the cathode ray tube (12) is in front of the center of curvature (16) of the mirror (14) and so that the mirror (14) reflects a near-infinity image of the visual display surface to an eyepoint (20) of an observer located below and in front of the center of curvature (16) of the mirror (14) and below the cathode ray tube (12). The cathode ray tube (12) is positioned at a height above the eyepoint (20) of the observer so that it does not interrupt the vertical field of view (24) of the image reflected to the eyepoint (20) of an observer. The concave mirror (12) may be a spherical, ellipsoidal or toroidal mirror. A multiple-display system (30) may be used to create a mosaic reflected image.