Multiplex video display

An electronic analog to a multiplex hologram is described. The system is comprised of a CRT and a Spatial Light Modulator (SLM). The SLM is thin film ferroelectric ceramic based. The CRT displays an NTSC raster, the light from which is amplitude modulated as it passes through the SLM. Each electrode on the SLM is driven by a separate video signal generated by an x-axis array, or by a computer. This produces a spatially multiplexed array of video images which, when viewed at a normal distance from the SLM, appear as a composite image having true depth. Color operation is achieved by tripling the number of electrodes on the SLM, and then associating an RGB filter array with them. Each filter/electrode group is fed the appropriate primary color trio signal from a video camera in the x-axis fly's eye array. Methods of bandwidth conservation are discussed, including a 6 MHz configuration which still permits viewing in true 3D without glasses. A method for achieving projected image operation is presented. A thick panel design is described briefly. Possible applications for this technology are mentioned as are areas requiring further research.© (1994) COPYRIGHT SPIE--The International Society for Optical Engineering. Downloading of the abstract is permitted for personal use only.