| 摘要 |
The objective of the present invention is to provide a counterfeit preventing structure which has an effect that can be confirmed by observation with the naked eye and has different optical effects on the front and back. This counterfeit preventing structure includes a micro-protrusion/depression reflective surface having a first surface that has micro-protrusions and micro-depressions and a second surface that has micro-protrusions and micro-depressions opposite to the first surface, a first color-adjusting layer that is provided on at least partial region (s) of the first surface and in contact with the first surface, and a second color-adjusting layer that is provided on at least partial region(s) of the second surface and in contact with the second surface, the first surface and second surface having micro-protrusion/depression surfaces that generate structural color by reflecting, interfering with, diffracting, scattering, and/or absorbing light from at least a portion of the visible region, wherein the difference between the refractive index of the first color-adjusting layer and the refractive index of the second color-adjusting layer is 0.1 or more. This counterfeit preventing structure makes it possible to obtain optical effects that are different under observation from a first color-adjusting layer side and a second color-adjusting layer side. |
