EP 2056260 A3 20100217 - Device and method for checking valuable documents
Title (en)
Device and method for checking valuable documents
Title (de)
Verfahren und Vorrichtung zur Prüfung von Wertdokumenten
Title (fr)
Procédé et dispositif destinés à la vérification de documents de valeur
Publication
Application
Priority
DE 102007044878 A 20070920
Abstract (en)
[origin: US2009078886A1] The invention relates to a method and an apparatus for recognizing forged documents of value, wherein the documents of value are illuminated with clocked excitation light of a light source. Within the bright phase of the excitation light a first luminescence intensity is detected, within the dark phase a second luminescence intensity. Because of the afterglow of the light pulses there is a residual fluorescence, which distorts the luminescence intensity in the dark phase. By linking the second luminescence intensity with the first luminescence intensity, e.g. by subtracting a scaled first luminescence intensity, a corrected second luminescence intensity is determined, which substantially corresponds to the phosphorescence signal of the document of value.
IPC 8 full level
G07D 7/12 (2006.01)
CPC (source: EP US)
G07D 7/1205 (2017.04 - EP US)
Citation (search report)
- [X] GB 2366371 A 20020306 - MARS INC [US]
- [A] WO 9909382 A1 19990225 - RUE DE INT LTD [GB], et al
- [A] US 6035914 A 20000314 - RAMSEY J MICHAEL [US], et al
Designated contracting state (EPC)
AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MT NL NO PL PT RO SE SI SK TR
Designated extension state (EPC)
AL BA MK RS
DOCDB simple family (publication)
US 2009078886 A1 20090326; US 7829869 B2 20101109; DE 102007044878 A1 20090409; EP 2056260 A2 20090506; EP 2056260 A3 20100217; EP 2056260 B1 20191030
DOCDB simple family (application)
US 23480208 A 20080922; DE 102007044878 A 20070920; EP 08014847 A 20080821