SECURITY MEDIUM AND AUTHENTICITY DETERMINATION METHOD USING THE SAME

摘要

PROBLEM TO BE SOLVED: To provide a security medium that is excellent in anti-fraud and anti-tampering characteristics, and an authenticity determination method using the same.

SOLUTION: The security medium includes a microlens array in which micro lenses are arranged at a first pitch, and a three-dimensional microstructure array formed by arranging three-dimensional microstructures arranged at a focal position of the micro lenses, at a second pitch different from the first pitch. The three-dimensional microstructure array is held between two plastic sheets to be integrated. The microlens array is formed on the surface of the plastic sheet on the observation side.

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