| 摘要 |
A substrate is arranged for presenting a three-dimensional optical image to a viewer. The substrate is formed with a multiplicity of pairs of spaced optical elements, with each pair of spaced optical elements being arranged for directing light incident thereon to a respective eye of the viewer, when the viewer is positioned at a predetermined angle of view or within a limited range of angles of view, for giving the viewer a perception of a point image located at a predetermined distance from a plane of the substrate at an intersection of lines followed by light rays from a respective optical element of a pair of spaced optical elements. The multiplicity of pairs of optical elements are arranged at different x and y orientations on the substrate, so that corresponding multiplicity of adjacent point images, so provided, together form the three-dimensional optical image for the viewer. |
