3D DISPLAY, AUTHENTICATOR, AND FORMATION METHOD

A three-dimensional display including a laminate sheet provided thereon with first element cells in which personal identification information is recorded, and second element cells carrying an authentication medium from which the personal identification information is visible, wherein the display includes a first region and a second region formed by arranging a plurality of the first element cells and a plurality of the second element cells which form respective phase shift structures; in the first region and in the second region, the first element cells and the second element cells are arranged in an interleaved manner at a predetermined ratio to form respective three-dimensional structures; the first region and the second region are visible respectively from first and second sides of the laminate sheet; a first reconstructed image is produced on the first side of the laminate sheet due to the phase shift structure formed by the first element cells; and a second reconstructed image is produced on the second side of the laminate sheet due to the phase shift structure formed by the second element cells.