| 摘要 |
PROBLEM TO BE SOLVED: To offer a hidden picture which is rich in design property and is of higher security nature such as protection against forgery. SOLUTION: The hidden picture referred in this invention is a detailed repetitive pattern 3 of the coloring material 3', which scatters/reflects the light of the specific wavelength range, formed on the base board 2, which either absorbs or transmits the light of at least in the specific wavelength range, and consists of the display object 4 of which phase of repetition cycle comes to shift between the domain A and the domain B of inside the display pattern and the detailed pattern sheet 7 layered on the display object 4 either integrally or separably. In this detailed pattern sheet 7, the repetitive pattern of the transparent section 5 and the volumetric diffraction lattice section 6 having the same repetitive cycle of the coloring material 3' is prepared. COPYRIGHT: (C)2007,JPO&INPIT |
