Patent ID: 11932043
Assignee: KARMIC SÀRL
Field: Other consumer goods (Other fields)
Classification: CPC B  G | IPC B  G

Claim 0:
1. A device comprising a set of three-dimensional microstructures, possessing at least one optically reflective face, said three-dimensional microstructures being formed on a surface defining a plane, where said microstructures are arranged in a plurality of subsets of microstructures presenting at least one azimuthal planar angle θ, defined between a direction parallel to at least one reflective face of said microstructure and a fixed reference axis of the device in the plane, identical with respect to one another within a subset and different from that of microstructures which are constitutive of other subsets of microstructures of said device, so as to display at least one transient image having optical properties which vary depending on the angle of observation, wherein the spacing and the multiplicity of transient images present in a given space in conjunction with the observation under different close and successive observation angles, a represented motif will appear as an animation, wherein an image comprises at least two distinct image zones, respectively a first zone designated as transient image zone and at least one other zone designated as latent image zone, in which microstructures constitutive of subsets are solely assigned to one of these at least two image zones, and characterized in that the azimuthal planar angles θ of the microstructures in each of said zones present a non-linear dependence, different for each of said zones, on at least one direction s common to all the image zones and wherein the non-linear functions θs in each of said zones form part of the same family of curves passing through the same value θ for at least one value of direction s.