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    • 89. 发明公开
    • SICHERHEITSELEMENT MIT MIKRO- UND MAKROSTRUKTUREN
    • 与微观和宏观结构安全要素
    • EP1492679A2
    • 2005-01-05
    • EP03714917.6
    • 2003-04-03
    • OVD Kinegram AG
    • STAUB, RenéSCHILLING, AndreasTOMPKIN, Wayne, Robert
    • B42D15/10
    • B42D25/328
    • The invention relates to a difficult-to-copy security element (2) that comprises a composite structure (1) with microscopically fine, optically effective structures (9) of a pattern that are embedded between two layers (5; 6) of the composite structure (1). In a plane defined by coordinate axes x and y of the pattern, in a boundary layer (8) between the layers (5; 6), the optically effective structures (9) are molded into subareas of a holographically not copiable security feature. In at least one subarea, the optically effective structure (9) is a diffractive structure (S, S*, S**) produced by additive overlay of a macroscopic overlay function (M) with a microscopically fine relief profile (R). Both the relief profile (R), the overlay function (M) and the diffractive structure (S, S*, S**) are functions of the coordinates x and y. The relief profile (R) is a light-diffractive or light-scattering optically effective structure (9) and maintains, following the overlay function (M), the predetermined profile height. The overlay function (M) is at least partially continuous and no periodic delta function or boxcar function. As compared to the relief profile (R), the overlay function (M) progresses slowly. When the composite structure (1) is tilted and turned, the observer perceives in the highlighted subareas bright, continuously moving stripes that depend on the direction of observation.
    • 90. 发明公开
    • SICHERHEITSELEMENT MIT MAKROSTRUKTUREN
    • 与宏观结构安全要素
    • EP1492678A2
    • 2005-01-05
    • EP03720418.7
    • 2003-04-03
    • OVD Kinegram AG
    • STAUB, RenéSCHILLING, AndreasTOMPKIN, Wayne, Robert
    • B42D15/00
    • B42D25/328
    • The invention relates to a security element (2) to be glued onto a document (3), which comprises a plastic composite structure (1) and embedded, optically effective structures of a pattern (4). The optically effective structures in subareas (13) of the pattern (4) lie in a reference plane of the composite structure (1) defined by a coordinate axis (x; y) and are molded into a reflective boundary layer. Said boundary layer is embedded between a transparent molding layer and a protective layer of the composite structure (1). At least one subarea (13) has a dimension of larger 0.4 mm and has at least one molded macrostructure (M) in the boundary layer, which macrostructure is an at least partially continuous and differentiated function of the coordinates (x; y). The macrostructure (M) is curved in at least subareas and is no periodic delta function or boxcar function. In the subarea (13), neighboring extreme values of the macrostructure (M) are at least 0.1 mm apart from one another. When the pattern is radiated with light, an optically variable pattern of light reflections is visible on the security element (2) when changing the visual angle.