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1. WO2020070299 - OPTICAL SECURITY ELEMENTS, MARKED OBJECT, METHOD OF AUTHENTICATING AN OBJECT AND USE OF OPTICAL SECURITY ELEMENTS FOR AUTHENTICATING OR SECURING AGAINST COUNTERFEITING

Publication Number WO/2020/070299
Publication Date 09.04.2020
International Application No. PCT/EP2019/076943
International Filing Date 04.10.2019
IPC
B42D 25/324 2014.01
BPERFORMING OPERATIONS; TRANSPORTING
42BOOKBINDING; ALBUMS; FILES; SPECIAL PRINTED MATTER
DBOOKS; BOOK COVERS; LOOSE LEAVES; PRINTED MATTER CHARACTERISED BY IDENTIFICATION OR SECURITY FEATURES; PRINTED MATTER OF SPECIAL FORMAT OR STYLE NOT OTHERWISE PROVIDED FOR; DEVICES FOR USE THEREWITH AND NOT OTHERWISE PROVIDED FOR; MOVABLE-STRIP WRITING OR READING APPARATUS
25Information-bearing cards or sheet-like structures characterised by identification or security features; Manufacture thereof
30Identification or security features, e.g. for preventing forgery
324Reliefs
CPC
B42D 25/324
BPERFORMING OPERATIONS; TRANSPORTING
42BOOKBINDING; ALBUMS; FILES; SPECIAL PRINTED MATTER
DBOOKS; BOOK COVERS; LOOSE LEAVES; PRINTED MATTER CHARACTERISED BY IDENTIFICATION OR SECURITY FEATURES; PRINTED MATTER OF SPECIAL FORMAT OR STYLE NOT OTHERWISE PROVIDED FOR; DEVICES FOR USE THEREWITH AND NOT OTHERWISE PROVIDED FOR; MOVABLE-STRIP WRITING OR READING APPARATUS
25Information-bearing cards or sheet-like structures characterised by identification or security features; Manufacture thereof
30Identification or security features, e.g. for preventing forgery
324Reliefs
Applicants
  • SICPA HOLDING SA [CH]/[CH]
Inventors
  • CALLEGARI, Andrea
  • DEGOTT, Pierre
  • DINOEV, Todor
  • EGGER, Philipp
Agents
  • CARVAJAL Y URQUIJO, Isabel
  • ONTAÑON, Ricardo
  • GALLARDO, Dámaso
Priority Data
18198945.005.10.2018EP
Publication Language English (EN)
Filing Language English (EN)
Designated States
Title
(EN) OPTICAL SECURITY ELEMENTS, MARKED OBJECT, METHOD OF AUTHENTICATING AN OBJECT AND USE OF OPTICAL SECURITY ELEMENTS FOR AUTHENTICATING OR SECURING AGAINST COUNTERFEITING
(FR) ÉLÉMENTS DE SÉCURITÉ OPTIQUE, OBJET MARQUÉ, PROCÉDÉ D'AUTHENTIFICATION D'UN OBJET ET UTILISATION D'ÉLÉMENTS DE SÉCURITÉ OPTIQUE POUR L'AUTHENTIFICATION OU LA PROTECTION CONTRE LA CONTREFAÇON
Abstract
(EN)
An optical security element made of a refractive transparent or partially transparent optical material and comprising an optical assembly of a caustic layer having a light-redirecting surface with a relief pattern of given depth and a focal length fC and an adjacent lens element of focal length fL configured to redirect incident light received from a point-like light source through it and to form a projected image containing a caustic pattern directly on a retina of an observer. A marked object, as well as a method of visually authenticating an object, and use of optical security elements for authenticating or securing against counterfeiting are also disclosed.
(FR)
Élément de sécurité optique constitué d'un matériau optique réfractif transparent ou partiellement transparent et comprenant un ensemble optique d'une couche caustique possédant une surface de redirection de lumière comportant un motif en relief d’une profondeur donnée et d’une longueur focale fC et un élément lentille adjacent de longueur focale fL, configurée pour rediriger la lumière incidente reçue d'une source de lumière de type ponctuelle à travers celle-ci et pour former une image projetée contenant un motif caustique directement sur une rétine d'un observateur. L'invention concerne également un objet marqué, ainsi qu'un procédé d'authentification visuelle d'un objet, et l'utilisation d'éléments de sécurité optiques pour l’authentification ou la protectionr contre la contrefaçon.
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