EP 4259450 A1 20231018 - SECURITY DEVICE AND METHOD OF MANUFACTURE THEREOF
Title (en)
SECURITY DEVICE AND METHOD OF MANUFACTURE THEREOF
Title (de)
SICHERHEITSVORRICHTUNG UND VERFAHREN ZU IHRER HERSTELLUNG
Title (fr)
DISPOSITIF DE SÉCURITÉ ET SON PROCÉDÉ DE FABRICATION
Publication
Application
Priority
- GB 202019383 A 20201209
- GB 2021053209 W 20211208
Abstract (en)
[origin: WO2022123241A1] A security device is disclosed, comprising: a substrate (12); a relief structure (20) on a first side of the substrate, the relief structure being a reflective or refractive light-redirecting relief structure configured to redirect light from a light source to thereby project a caustic image; and a colour filter (30). The colour filter is configured to overlap in use at least part of the relief structure, and comprises one or more at least semitransparent materials, at least one of the materials transmitting only a subset of visible light wavelengths corresponding to a respective non-white colour. The caustic image projected by the security device exhibits one or more colour(s) when the security device is illuminated with white light.
IPC 8 full level
B42D 25/324 (2014.01); B42D 25/333 (2014.01); B42D 25/351 (2014.01); B42D 25/36 (2014.01); B42D 25/364 (2014.01); B42D 25/373 (2014.01); B42D 25/378 (2014.01); B42D 25/425 (2014.01); G02B 3/08 (2006.01)
CPC (source: EP GB)
B42D 25/29 (2014.10 - GB); B42D 25/324 (2014.10 - EP GB); B42D 25/333 (2014.10 - EP); B42D 25/351 (2014.10 - EP); B42D 25/36 (2014.10 - EP GB); B42D 25/364 (2014.10 - EP); B42D 25/373 (2014.10 - EP); B42D 25/378 (2013.01 - EP); B42D 25/425 (2014.10 - EP); G02B 5/223 (2013.01 - EP); G02B 5/286 (2013.01 - EP); G02B 1/005 (2013.01 - EP)
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 2022123241 A1 20220616; AU 2021397868 A1 20230622; AU 2021397868 A9 20240808; EP 4259450 A1 20231018; GB 202019383 D0 20210120; GB 202117708 D0 20220119; GB 2604011 A 20220824; GB 2604011 B 20230503
DOCDB simple family (application)
GB 2021053209 W 20211208; AU 2021397868 A 20211208; EP 21827634 A 20211208; GB 202019383 A 20201209; GB 202117708 A 20211208