FIELD: physics.
SUBSTANCE: in a security element for the manufacture of valuable documents such as banknotes, checks or the like that has an upper side, on which a microrelief structure is provided having, at least, two partial portions that have a plurality of grooves and/or ribs respectively located next to each other, extending along the longitudinal direction, reflecting or back scattering structural elements. Moreover, the longitudinal directions of the partial portions are different, it is provided that the structural elements are made accordingly with the absence of the possibility of the naked eye with respect to the width across the longitudinal direction, and the incident parallel light is achromatically dissipated into a fan that is located across the longitudinal direction and has an opening angle of, at least, 30°.
EFFECT: proposed security element with a simplicity of manufacture has a heavily reproducible effect.
17 cl, 9 dwg
