| 摘要 |
PROBLEM TO BE SOLVED: To provide a hologram pattern, which can be easily judged as a copy by a method wherein the copy is seen undoubtedly as incompatible with the original pattern even when a copy is formed from any scanning direction. SOLUTION: In a hologram pattern, in which a reflecting layer is formed over the whole surface of a substrate by properly combining relief-type holograms on the surface of the same substrate, a plurality of kinds of holograms, at least the directions of which are different from one another, are so constituted as to be combined with one another so as to realize reflective diffractions in a plurality of directions. Further, a hologram, the constituted unit of which is a dot, may also be allowed. Furthermore, a region, in which no hologram is present, may be provided. |
