| 摘要 |
PROBLEM TO BE SOLVED: To provide a forgery prevention structure having excellent design properties and/or security properties.SOLUTION: A forgery prevention structure includes at least a relief-forming layer, a first reflection layer, a functional thin film layer, a second reflection layer, and a protective layer, which are laminated in this order. The relief-forming layer has a relief structure having effect of diffraction, dispersion, absorption, and polarization separation for at least a certain wavelength area of visible light on one side. The first reflection layer and the functional thin film layer are disposed along asperities of the relief structure on the whole area. The second reflection layer is disposed on an arbitrary area partially covering the asperities of the relief structure. The protective layer is disposed to cover only the area of the second reflection layer. The three layers including the first reflection layer, the functional thin film layer, and the second reflection layer cause interference of visible light at least in a certain area.SELECTED DRAWING: Figure 1 |
