FORGERY PREVENTIVE VOLUME HOLOGRAM LAMINATE

摘要

PROBLEM TO BE SOLVED: To provide a forgery preventive volume hologram laminate which can surely prevent a forgery even if a person attempts to duplicate a volume hologram based on this volume hologram laminate. SOLUTION: The forgery preventive volume hologram laminate is a laminate with at least a transparent surface protective layer, a volume hologram layer and an adhesive layer successively laminated therein and is formed by disposing a boundary having a refractive index difference to reflect the reconstruction wavelength light of the volume hologram between the transparent surface protective layer and the volume hologram layer and/or between the volume hologram layer and the adhesive layer and specifying this refractive index difference to >=0.08.