擬似高解像度化によるホログラムの水平視域角拡大(<小特集>3次元映像情報メディア技術)

概要

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We developed a new technique that enables the ratio of horizontal and vertical resolutions of a spatial light modulator (SLM) to be altered. This technique virtually increases the horizontal resolution of an SLM so that the horizontal viewing angle of a hologram displayed by the SLM is also increased. An SLM illuminated by a slanted point light source array is imaged by a 4f imaging system in which a horizontal slit is located on a Fourier plane. When the number of point light sources is K, the horizontal resolution increases K times and the horizontal viewing angle increases approximately K times. We demonstrated the horizontal viewing angle enlargement using an SLM with a pixel pitch of 9.5μm and a resolution of 4,096×2,160. The number of light sources was four (K=4.) The horizontal resolution was increased to 16,384 and the horizontal viewing angle was increased to approximately 15゜. The resultant three-dimensional images can be observed by both eyes.
社団法人映像情報メディア学会の論文
2008-04-01