| 摘要 |
An authenticity indicator that is difficult to be forged and whose authenticity can be confirmed easily and accurately is provided. The authenticity of the authenticity indicator 10 can be checked by making light enter the authenticity indicator 10 from front side and observing the light emerging from the front side or rear side. The authenticity indicator comprises a polarized-light selectively reflecting layer 30 that reflects a specified polarized component of incident light, and a transmission volume hologram layer 20 disposed on the front side of the polarized-light selectively reflecting layer 30. According to this authenticity indicator, its authenticity can be checked accurately by making use of its first authenticity recognition function attributed to the diffracting action of the transmission volume hologram layer and its second authenticity recognition function attributed to the polarized-light selectivity of the polarized-light selectively reflecting layer.
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