Patent ID: 7852557

Claim:
A stereoscopic sheet structure comprising: a convex lens assembly comprising a plurality of convex lenses provided on one surface of a first sheet member and disposed at predetermined first arrangement intervals and in predetermined first arrangement directions, wherein the convex lenses focus light on a focal plane; and a repeating design portion which comprises one or more continuously deformed design portions in which a plurality of design units are arranged on the focal plane of the convex lenses at second arrangement intervals and in second arrangement directions which are different from the first arrangement intervals and/or the first arrangement directions of the convex lenses, and in which a design pattern that has the plurality of the design units arranged at third arrangement intervals which are different from the first arrangement intervals of the plurality of the convex lenses of the convex lens assembly has therein a plurality of sections which are obtained by division at regular intervals in the respective third arrangement directions of the design units wherein each of the sections has an equal number of the design units, and the design pattern is deformed such that a section formed along at least one of the second arrangement directions has a plurality of design units that are arranged in the one direction at second arrangement intervals that are different from second arrangement intervals that follow the one direction in the design units contained in another section adjacent to the section in the one direction, and in each section such that the second arrangement intervals of the design units of the sections formed along the one direction become larger sequentially after becoming smaller sequentially, or become smaller sequentially after becoming larger sequentially, so as to be symmetric.