EP 4251430 A1 20231004 - PERSONALISED IMAGE FORMED FROM A METAL LAYER AND A LENTICULAR ARRAY
Title (en)
PERSONALISED IMAGE FORMED FROM A METAL LAYER AND A LENTICULAR ARRAY
Title (de)
PERSONALISIERTES BILD AUS EINER METALLSCHICHT UND EINEM LINSENRASTER
Title (fr)
IMAGE PERSONNALISEE FORMEE A PARTIR D'UNE COUCHE METALLIQUE ET D'UN RESEAU LENTICULAIRE
Publication
Application
Priority
- FR 2012409 A 20201130
- FR 2021052075 W 20211123
Abstract (en)
[origin: WO2022112708A1] The invention relates, in particular, to a security document (10) comprising: a metal layer (14) comprising an arrangement of diffractive nanostructures arranged periodically in the metal layer so as to form a diffractive holographic structure forming an arrangement of pixels each comprising a plurality of sub-pixels of distinct colours; a lenticular array (12) comprising convergent lenses (13) positioned facing the metal layer; and a support layer (16) on which the metal layer is disposed so that the metal layer (14) is sandwiched between the lenticular array (12) and the support layer (16). The metal layer comprises perforations (20) formed by focusing laser radiation (RY) through the lenticular array on the metal layer (14), the perforations comprising at least one group of perforations (RY) produced by focusing the laser radiation (RY) at a respective angle of incidence (Θ) so as to reveal a corresponding personalised image (IG) when the security document is observed at this angle of incidence.
IPC 8 full level
B42D 25/324 (2014.01); B42D 25/328 (2014.01); B42D 25/346 (2014.01); B42D 25/373 (2014.01); B42D 25/387 (2014.01); B42D 25/41 (2014.01); B42D 25/435 (2014.01)
CPC (source: EP US)
B42D 25/324 (2014.10 - EP US); B42D 25/328 (2014.10 - EP US); B42D 25/346 (2014.10 - EP US); B42D 25/373 (2014.10 - EP US); B42D 25/387 (2014.10 - EP US); B42D 25/435 (2014.10 - EP US)
Designated contracting state (EPC)
AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR
Designated extension state (EPC)
BA ME
Designated validation state (EPC)
KH MA MD TN
DOCDB simple family (publication)
WO 2022112708 A1 20220602; EP 4251430 A1 20231004; FR 3116761 A1 20220603; FR 3116761 B1 20240209; US 2024017563 A1 20240118
DOCDB simple family (application)
FR 2021052075 W 20211123; EP 21823980 A 20211123; FR 2012409 A 20201130; US 202118253794 A 20211123