| 摘要 |
PROBLEM TO BE SOLVED: To provide a diffraction structure transfer foil which enables the observation of a diffraction light image by the incident light from a surface, generates the diffraction light by backlight due to the multiple recording of the diffraction grating pattern made even in the state of generation the backlight during such observation as incidence of the light from the rear of the diffraction structure, and allows the observation of the diffraction light from the surface of the diffraction structure, and to provide a forgery prevention medium. SOLUTION: The diffraction structure transfer foil constituted by laminating four layers of at least a peeling protective layer, a diffraction structure forming layer, a transparent reflection layer, and an adhesive layer in this order viewed from a support side, is formed with the multiple recorded diffraction structure for generating the separate diffraction light in the case where the diffraction light generated by the incidence of the light is made incident on the diffraction structure forming layer from the peeling protective layer side and the case where the light is made incident from the adhesive layer side. COPYRIGHT: (C)2008,JPO&INPIT |
