Security element

Details Security element Security element

B - Operations, Transporting

42

D

B42D 15/10 (2006.01)

Patent

CA 2533094

The invention relates to a security element, preferably for value documents, comprising at least one region with a holographic element which reconstructs a holographic optical image under certain observation conditions. Said region comprises sub-regions which do not take part in the reconstruction of the holographic optical image and which represent recognisable information. The information represented by the sub-regions is essentially only recognisable under those observation conditions in which the holographic optical image can also be observed.

L'invention concerne un élément de sécurité, de préférence pour documents de valeur, qui présente au moins une zone avec une structure de diffraction qui, dans certaines conditions d'observation, reconstruit une image optique à diffraction. Cette zone présente des sous-zones qui ne participent pas à la reconstruction de l'image optique à diffraction et qui représente une information reconnaissable. A cet effet, il est essentiel que l'information représentée par les sous-zones ne soient essentiellement reconnaissables que dans les conditions d'observation dans lesquelles l'image optique à diffraction peut être également perçue.

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