US 12,233,659 B2
Security document having a personalized image formed from a metal hologram and method for the production thereof
Christophe Duriez, Courbevoie (FR); and Paul Azuelos, Courbevoie (FR)
Assigned to IDEMIA FRANCE, Courbevoie (FR)
Appl. No. 17/779,738
Filed by IDEMIA FRANCE, Courbevoie (FR)
PCT Filed Nov. 10, 2020, PCT No. PCT/FR2020/052053
§ 371(c)(1), (2) Date May 25, 2022,
PCT Pub. No. WO2021/105582, PCT Pub. Date Jun. 3, 2021.
Claims priority of application No. 1913513 (FR), filed on Nov. 29, 2019.
Prior Publication US 2023/0024208 A1, Jan. 26, 2023
Int. Cl. B32B 3/10 (2006.01); B42D 25/328 (2014.01); B42D 25/346 (2014.01); B42D 25/435 (2014.01)
CPC B42D 25/328 (2014.10) [B42D 25/346 (2014.10); B42D 25/435 (2014.10)] 13 Claims
OG exemplary drawing
 
1. A secure document comprising:
a first layer comprising a metal holographic structure forming an arrangement of pixels each including a plurality of sub-pixels of distinct colors; and
a second layer positioned facing the first layer, the so-called second layer being opaque to at least the visible wavelength spectrum;
wherein the first layer comprises first perforations formed by a first laser beam, at least a first part of the first perforations locally revealing through the holographic structure a number of dark areas in the sub-pixels caused by underlying regions of the second opaque layer located facing said at least a first part of the first perforations, such as to form a personalized image starting from the arrangement of pixels combined with the dark areas.