US 12,472,764 B2
Optically variable security element and value document with the optically variable security element
Moritz Hofer, Munich (DE); Christian Stockl, Gmund a. Tegernsee (DE); Matthias Blazek, Bad Wiessee (DE); Christian Fuhse, Otterfing (DE); and Michael Rahm, Bad Tolz (DE)
Assigned to GIESECKE+DEVRIENT CURRENCY TECHNOLOGY GMBH, Munich (DE)
Appl. No. 18/567,607
Filed by GIESECKE+DEVRIENT CURRENCY TECHNOLOGY GMBH, Munich (DE)
PCT Filed May 24, 2022, PCT No. PCT/EP2022/025241
§ 371(c)(1), (2) Date Dec. 6, 2023,
PCT Pub. No. WO2022/268357, PCT Pub. Date Dec. 29, 2022.
Claims priority of application No. 10 2021 003 185.7 (DE), filed on Jun. 21, 2021.
Prior Publication US 2024/0262122 A1, Aug. 8, 2024
Int. Cl. B42D 25/324 (2014.01); B42D 25/328 (2014.01)
CPC B42D 25/324 (2014.10) [B42D 25/328 (2014.10)] 15 Claims
OG exemplary drawing
 
1. An optically variable security element with a motif region, wherein:
(a) a plurality of differently oriented first facets and a plurality of differently oriented second facets are arranged in the motif region, wherein each of the first and second facets defines a normal vector with a first orientation component in a direction of a first axis and a second orientation component in a direction of a second axis which is not parallel to the first axis, and wherein the optically variable security element defines an x-y plane;
(b) the first facets comprise first sub-wavelength structures and the second facets comprise second sub-wavelength structures, wherein the first sub-wavelength structures are different from the second sub-wavelength structures;
(c) in the motif region, at least one motif is visible to an observer in a depiction and with a color impression;
(d) the depiction of the at least one motif changes for the observer as the optically variable security element is tilted about the first axis; and
(e) the color impression of the at least one motif changes for the observer as the optically variable security element is tilted about the second axis
wherein
(f) the color impression of the at least one motif is determined by the first orientation components, and the depiction of the at least one motif is determined by the second orientation components;
(g) the first orientation components of the first facets and the second facets are different from one another; and
(h) at least some of the first and second facets are tilted in the direction of the first axis and in the direction of the second axis.