| 摘要 |
PROBLEM TO BE SOLVED: To provide a new hologram sheet having a hologram relief formed therein, in which a hologram is reproduced at a wavelength in a direction different from those of illumination light by applying a prescribed voltage so as to enhance the authenticity of the hologram sheet, while a hologram image can not be recognized with a normal indoor illumination light source or the like.SOLUTION: Counterfeit prevention property is enhanced by disposing an electroluminescence element having a hologram relief pattern and is configured in such a manner that only when a prescribed voltage is applied to the electroluminescence element, a hologram pattern at a prescribed visible light wavelength appears in a space, and thereby, authenticity of the hologram can be visually checked. |
