Abstract: A holographic aircraft antenna and method of fabricating the antenna are disclosed herein. The antenna includes a thin layer of dielectric strips of material contoured to and mounted on the conductive skin of the aircraft or a plurality of thin metal conducting strips secured to the skin of a composite aircraft. The spacing, width and size of the thin strips forms a hologram which is determined by the interference pattern of radio frequency beams selected for and directed at a holographic recording medium at particular angles to provide a desired or series of desired radiation patterns. In addition, a radar reduction device is provided wherein the hologram includes thin strips of dielectric material on the conductive skin of the aircraft or thin metal conducting strips on the composite aircraft.

Abstract: A range-finding system comprising the hardwired video processing of two side-by-side TV stereo images of a scene to provide automatic, rapid, quantitative ranging to noncooperative objects. A single TV camera with appropriate optics to provide stereo inputs or, in a preferred embodiment, two TV cameras, provide the stereo images. Range is determined for any change of contrast in the common TV stereo scene to obtain the parallax displacement of corresponding object features with a three scan line delay of less than 200 microseconds. The video of the synchronized line scan of both cameras is stored as they are scanned, thus range can be determined with relative motion between the stereo camera and objects in the scene. Range is stored in on-board RAM's for each pixel of the TV scene and is available after three TV lines of delay. Range up-dating is continuous as the TV raster is scanned, or the range of a particular TV frame may be frozen for detailed study.

Abstract: An automatic processing circuit is associated with an optical matched filter system which supplies correlation imagery representing the products of diffraction patterns of known objects with that of an input scene in which the known objects are to be detected. The disclosed circuitry distinguishes between auto and cross-correlations in the supplied imagery using a number of criteria including peak amplitude, rising slope, peak width, and normalized amplitude.

Abstract: A two step process allows a multiple holographic lens to be recorded with a single exposure. A multiple exposure, non-overlapping holographic fly's eye lens is first prepared with the correct F number spacing. A single collimated beam striking the fly's eye lens results in a multiple refracted beam array which is allowed to interfere with a second reference beam on a photographic plate. The resulting multiple holographic lens will have equal intensity playback beams, no distortion cross product terms, and improved optical efficiency over multiple superimposed exposure lenses.

Abstract: A liquid crystal device comprising a liquid crystal layer intermediate a substrate coated by a surfactant and another substrate coated by a photoconductive and a surfactant thereover that is manufactured by taking cleaned electrically conductive transparent substrates and depositing a photoconductor such as cadmium sulfide to one with thereafter treating that one so as to coat it with a surfactant and at the same time coat the other substrate with a surfactant before joining the substrates with a liquid crystal therebetween whose molecules are oriented by the said surfactant.