Abstract: An improved power supply for alternate frame stereoscopic image presentat system includes a switch circuit for triggering two light valves mounted to present alternate left-right images to a viewer. A delay circuit using a variable pulse length monostable multivibrator permits the length of the "on" time to be adjusted to prevent light valve delays from introducing stereoscopic "ghosts".

Abstract: A detector for differential optical polarization effects comprises a television camera incorporating a polarization analyzing system, the camera generating two similar video signals representing two views of the same scene which are derived by means of light components differing only in respect of their polarization characteristics. The two video signals are compared over the whole scene on a point-by-point basis, the result of the comparison suitably being displayed in pictorial form.

Abstract: A scanning electron microprobe and display system adaptable to stereoscoptic or side-by-side viewing of an image for comparison on a television type monitor. The apparatus includes means for scanning the microprobe beam in a raster over a specimen and displaying the image on the cathode ray tube viewer. The microprobe beam scan is synchronized to the beam of the cathode ray tube and the cathode ray tube horizontal scan is blanked over a portion of its extent for sequential fields. For stereo viewing, the angle of incidence of the microprobe is varied in relation to the blanking sequence to provide side-by-side images on the cathode ray tube, each of which are generated from different microprobe incidence angles.

Abstract: A picture in the form of a print or projected image onto a rear view screen in a suitable mounting is positioned in a vertical plane and the mounting then rotated extremely rapidly about a vertical axis exactly bisecting the picture in the plane. With this arrangement, each person in an audience surrounding the mounting over 360.degree. can view the picture each time the viewer's line of sight is normal to the plane of the picture so that, in effect, the entire audience regardless of their position over 360.degree. can view the single picture simultaneously.

Abstract: A passive mobile rangefinder and stereo viewer having at least two image verting television cameras each mounted on spaced apart, remotely controlled mobile supports with synchronous drives for azimuth and elevation control. Ranging components associated with each television camera, with data links to remote locations, provide continuous baseline variation data. A baseline selector and mixer data analyzer direct the video signals from the selected pair of cameras to the remote viewing location. A rangemarker in the observer's field of view or electronic correlation techniques provide the range data.

Abstract: Stereoscopic inputs given by a display, where the stereo images are centered on respective intersecting optical axes, which images both stereo inputs on a field lens at the intersecting which forms, in turn, exit pupils at a predetermined focal distance from the field lens on the respective optical axes. The input lenses are spaced such that the distance between the formed pupils is equal to the interpupillary distance of the viewer. The viewer merely positions himself such that his right eye is coincident with the one exit pupil and the left eye becomes coincident with the other exit pupil. Selection of the proper optics for any given stereo application first requires consideration of the parameters involved and their influence on the application at hand. Some of the display parameters are necessarily linked to sensor parameters and vice versa. Also, certain visual system parameters are dictated.

Abstract: In a scanned multiple image display device a plurality of individual projectors produces a single composite image by optically combining individual projector outputs. The individual images must be converged with each other to produce an acceptable display. A digital computer is used to generate and store words that correspond to the required convergence correction for individual projectors. The stored words are read out of the computer in accordance with projector scanning timing and, after being converted to analog form, are used to correct the scanning to produce convergence.

Abstract: A depth perception television system is described. Light radiation from a three-dimensional scene is collected by a convergent lens and transmitted through a lenticulated grid onto the face of a light radiation sensing tube of a television camera. The lenticulated grid is made up of a multiplicity of vertically oriented lens elements, each of which has a generally cylindrical arc incident surface and a generally planar exit surface. Such lenticulated grid acts to separate light radiation received thereby into a plurality of image elements of each aspect of the scene and then focus the same at predetermined locations on the pick-up surface of the camera. An electrical signal representative of the locations on the face of the camera at which such image elements are focused is formed in a conventional manner by the camera and transmitted to a monitor which conventionally displays such image elements on a display screen, such as the face of a cathode ray tube.