GENUINENESS IDENTIFIER, GENUINENESS CRITERION SHEET AND GENUINENESS DECISION METHOD

摘要

PPROBLEM TO BE SOLVED: To provide a genuineness identifier which does not allow a visually recognizable hologram image to be formed, with its irregular discrete state and does not make available genuineness decision information whatever, even in the case that an optical microscope is used, as well as a genuineness decision method which can make a genuineness decision easily only by holding a genuineness criterion sheet for deciding the intrinsic genuineness of the genuineness identifier over the genuineness identifier in such a way that the sheet can touch the identifier. PSOLUTION: This genuineness identifier is constituted of a transparent resin layer 2 with a surface where a hologram relief formed of a diffraction grating 3 for regenerating a hologram image in such a fashion that the diffraction grating 3 is transformed in discrete micropixel units, and optical elements 4 different from the diffraction grating 3, are alternately formed, on one of the surfaces of a transparent base material 1. In addition, a reflective thin film layer 5 is formed successively on the hologram relief and also, on the surface where the optical element 4 is formed. PCOPYRIGHT: (C)2011,JPO&INPIT