| 摘要 |
The invention relates to an element (12) that includes an array (14) of raised lines (16), each line (16) including at least one flank (18A, 18B), each of which define an inclination angle (a1) relative to a direction normal (Z) to the array (14). More precisely, the inclination angle (a1) of the flank (18A, 18B) of at least one line (16) of the array (14) gradually changes along said line (16) so as to form, in terms of light reflection, a degraded optical effect that changes based on the observation angle of the security element. |
