Counterfeit-preventive optical element and information medium
Provided are a highly versatile counterfeit-preventive optical element applicable to both the banknote field and the ID field and an information medium including the optical element. A counterfeit-preventive optical element (1) of an embodiment includes a first layer (2), second layer (3), and a thi...
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Format: | Patent |
Sprache: | eng |
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