Abstract: An autostereoscopic display is adapted to have its viewing zones follow an observer's head by incorporating a device for monitoring the position of the observer's head, using the monitoring information to determine which set of light emitting lines is on in the display and which set of picture information is displayed on the picture elements (pixels), and selecting the illuminating lines relative to the light valve so that the viewing zones are continuously centered at the observer's head as the observer moves.

Abstract: A portable or "lap-top" computer includes an associated head mounted display. The display is constructed in a manner similar to a pair of eyeglasses but with liquid crystal display screens replacing or forming a portion of the eyeglass lenses. The display screens can be either opaque or light transmitting, and can be hinge mounted to the glasses frame so that they can be swung up and out of the field of vision of the user. Specialized uses for the portable computer and head mounted display include a computer desk for secretarial workstations and the like, a research library workstation, and a moving map installation in an automobile or airplane.

Abstract: Stereoscopic optical apparatus comprising a housing constructed to exclude spurious light sources, first and second optical devices having reflecting surfaces which together form a first pair of optical devices, and third and fourth optical devices having reflecting surfaces which together form a second pair of optical devices. The stereoscopic optical apparatus being such that the first optical device is positioned below the second optical device and the third optical device is positioned below the fourth optical device, the first and third optical devices are inclined a first way and the second and fourth optical devices are inclined a second way. One of the optical devices from the first and second pairs of optical devices being such as to form two optical devices which are level and have their optical center lines separated by a distance, "d", said pairs of optical devices providing left and right views of an object.

Abstract: A stereoviewer for observing a stereo pair of photographs three-dimensionally through binocular lenses is shown and described. The stereoviewer comprises a box-shaped main body case having a space for accommodating stereoscopic photographs; a lid for covering the main body case; holder portions provided on one side surface of the box-shaped main body case so as to position and hold the stereoscopic photographs in a non-perpendicular standing state; and binocular lenses provided thereon are inclined in such a manner that the binocular lenses face the vertical center portion of the stereoscopic photographs. This stereoviewer also serves as a package and has a simple structure. The thickness of the binocular lenses are varied so that the focal distance is different between the upper portion and the lower portion of said binocular lenses and the binocular lenses are decentered outwardly in the horizontal direction.

Abstract: An automatic viewer for half-frame stereoprints includes a base with a pair of lenses for stereoscopic viewing mounted thereon. The base has a kicking foot and picking detent projecting therethrough for engaging openings in a carrier deck upon which the half-frame stereoprints are pivotally mounted. A control mechanism utilizes cams to coordinate movement of the kicking foot and picking detent to index the carrier deck across the base so that the photoprints may be viewed individually. The carrier deck has two rows of openings for receiving the kicker foot, allowing the viewer to advance the carrier deck from either end presenting a first set of photoprints for viewing when advancing from one end and a second set of photoprints for viewing when advanced from the opposite end. The carrier deck may be stored with other carrier decks in a binder.

Abstract: An apparatus for presentation of apparent three-dimensional images without special viewing glasses is disclosed. A projection system projects right and left stereo images from a stereoscopic slide so that the right stereo image and the left stereo image become superimposed relative to one another on a viewing screen. The viewing screen comprises light transmissive slit-raster members and a light diffusion member. The viewing screen is adapted to allow the right and left stereo images to pass between the opaque raster members and be perceived only by the right and left eyes, respectively, of the viewer as the left image formed in a raster-like manner on the diffusion member is blocked by further opaque raster members and prevented from being perceived by the right eye and the right stereo image also formed in a raster-like manner on the diffusion member is blocked by the further opaque raster members and prevented from being perceived by the left eye.

Abstract: A stereoscopic electronic viewer for a stereo image pair provided in a fixed medium includes a light source which passes light rays through the fixed images of the stereo image pair. The rays project onto a mirror which redirects the rays through a lens unit. The light rays from each image are associated with a particular lens in the lens unit which focuses the image onto an associated CCD image sensor. The two CCD image sensors have separate but synchronized electronics and provide a synchronized output which is fed to a stereo viewing device such as stereo goggles or a time-multiplexed polarized display. The electronic viewer is mechanically designed to manipulate the image produced on the display device to allow for panning and zooming of the stereoscopic image while maintaining the full resolution provided by the image sensor.

Abstract: A hand held or table positioned mat selection device (FIG. 1) in which the viewing eyepiece (28) is used to restrict the field of view to a mat or mats (FIG. 13: 40A, 40B and 40C) and their apertures (41C) in a carrier (36) which may be moved forward or backward so as to fill the periphery of the visual field, and with the viewing device aimed at the picture to be matted 20 (FIGS. 9A and 9B) so that the illusion of a mat surrounding a picture (FIG. 11) is created and preserved. The capacity of the mat selection device for monocular viewing (FIG. 3A) and binocular viewing (FIG. 3B) is described.

Abstract: This invention relates to a universal stereoscopic viewer that by means of modifying the current lens-slide distance used up to the present, affords any user a sharp, clear three-dimensional vision of a pair of images.

Abstract: A holographic optical system includes a hologram which is located at an instrument panel so as to reflect or transmit an image from a source located off the panel. The image is redirected only to an area at which the viewer may observe the image and is not directed to other areas so as to prevent unwanted reflections and glare such as where the instrument panel is within an aircraft cockpit.