Abstract: An AR optical element having high image quality, high efficiency of light utilization, and small-size is provided. The AR optical element has periodic structures of refractive index multiplexed with a predetermined interval and predetermined multiplicity, wherein each of the periodic structures of refractive index has an optical normal in a different direction from a physical normal orthogonal to a plane of a micro-region that reflects incident light.

Abstract: An electronic holographic display device includes: a beam emitting device; a plurality of polarizing beam splitters; a plurality of spatial light modulators, each of which is disposed with prescribed distances therebetween and modulates a beam vertically made incident from the corresponding polarizing beam splitter; a magnifying optical system; and a reducing optical system. The magnifying optical system includes a first lens array and a second lens array. The reducing optical system includes a third lens array and a fourth lens array. A distance “a” between the spatial light modulator and the first lens is represented by a=(k+2)f0/(k+1), wherein a ratio “k” is a distance between two adjacent spatial light modulators, to a size of the spatial light modulator, and f0 is a focal point distance of the first lens.

Abstract: A stereoscopic video encoding device inputs therein: a multi-view video constituted by a reference viewpoint video, a left viewpoint video, and a right viewpoint video; and a reference viewpoint depth map, a left viewpoint depth map, and a right viewpoint depth map, each of which is a map of a depth value associated with the multi-view video. In the stereoscopic video encoding device, based on a synthesis technique indicated by a depth type, a video synthesis unit synthesizes a plurality of videos, and a depth map synthesis unit synthesizes a plurality of depth maps. A video encoding unit, a depth map encoding unit, and a parameter encoding unit encode, by respective units, respective parameters containing a synthesized video, a synthesized depth map, and a depth type, respectively. A multiplexing unit multiplexes the encoded parameters into an encoded bit string and transmits the multiplexed encoded bit string.

Abstract: An electronic holographic display device includes: a beam emitting device; a plurality of polarizing beam splitters; a plurality of spatial light modulators, each of which is disposed with prescribed distances therebetween and modulates a beam vertically made incident from the corresponding polarizing beam splitter; a magnifying optical system; and a reducing optical system. The magnifying optical system includes a first lens array and a second lens array. The reducing optical system includes a third lens array and a fourth lens array. A distance “a” between the spatial light modulator and the first lens is represented by a=(k+2)f0/(k+1), wherein a ratio “k” is a distance between two adjacent spatial light modulators, to a size of the spatial light modulator, and f0 is a focal point distance of the first lens.

Abstract: A stereoscopic video coding device inputs therein a reference viewpoint video and a left viewpoint video, as well as a reference viewpoint depth map and a left viewpoint depth map which are maps showing information on depth values of the respective viewpoint videos. A depth map synthesis unit of the stereoscopic video coding device creates a left synthesized depth map at an intermediate viewpoint from the two depth maps. A projected video prediction unit of the stereoscopic video coding device extracts, from the left viewpoint video, a pixel in a pixel area to constitute an occlusion hole when the reference viewpoint video is projected to another viewpoint and creates a left residual video. The stereoscopic video coding device encodes and transmits each of the reference viewpoint video, the left synthesized depth map, and the left residual video.

Abstract: This invention discloses a polishing method for flattening an inter-level insulating film or polycrystalline silicon inside a device isolation ditch in a semiconductor fabrication process.To this end, the present invention grinds and flattens an insulating film having a step on the surface thereof by using a polishing solution containing an alkali solution and a grain, wherein a cation concentration in the alkali solution is higher than an OH.sup.- ion concentration in the alkali solution.