the picture elements emitting light at places where a pair of light beams intersect in a transparent material

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Stereoscopic video systems; Multi-view video systems; Details thereof > Image reproducers (optical systems for producing stereoscopic or other three-dimensional [3D] effects G02B30/00) > Volumetric displays, i.e. systems where the image is built up from picture elements distributed through a volume > the picture elements emitting light at places where a pair of light beams intersect in a transparent material