EP 1503904 A2 20050209 - VERIFY SECURITY DOCUMENTS BY MEANS OF POLARISED LIGHT
Title (en)
VERIFY SECURITY DOCUMENTS BY MEANS OF POLARISED LIGHT
Title (de)
ECHTHEITSÜBERPRÜFUNG VON SICHERHEITSDOKUMENTEN MITTELS POLARISIERTEM LICHT
Title (fr)
VERIFICATION DE DOCUMENTS DE SECURITE AU MOYEN DE LUMIERE POLARISEE
Publication
Application
Priority
- IT 0300202 W 20030403
- IT VR20020031 A 20020405
Abstract (en)
[origin: WO03084767A2] A process for the recognition of elements marked with OVI<TM> (Optical Variable Ink) comprising the following steps:- production of a ray of polarised light by the use of a first polarising filter on a source of light; Exposure of the part of the document or banknote marked with OVI<TM> type inks to the ray of polarised light; Additional filtering of the light reflected by the document or the banknote by means of a second polarising filter placed at an appropriate reciprocal angle with respect to the degree of polarisation of the incident light;- Detection of the variation in luminescence.
IPC 1-7
IPC 8 full level
CPC (source: EP US)
G07D 7/1205 (2017.05 - EP); G07D 7/121 (2013.01 - EP US); G07D 7/128 (2013.01 - EP)
Designated contracting state (EPC)
AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HU IE IT LI LU MC NL PT RO SE SI SK TR
DOCDB simple family (publication)
WO 03084767 A2 20031016; WO 03084767 A3 20040226; AU 2003230197 A1 20031020; AU 2003230197 A8 20031020; EP 1503904 A2 20050209; IT VR20020031 A0 20020405; IT VR20020031 A1 20031006
DOCDB simple family (application)
IT 0300202 W 20030403; AU 2003230197 A 20030403; EP 03723051 A 20030403; IT VR20020031 A 20020405