EP 0725375 B1 19991229 - Apparatus for authenticating documents
Title (en)
Apparatus for authenticating documents
Title (de)
Vorrichtung zum Authentifizieren von Dokumenten
Title (fr)
Appareil d'authentification de documents
Publication
Application
Priority
GB 9501921 A 19950201
Abstract (en)
[origin: EP0725375A2] In apparatus for authenticating documents (12) such as banknotes, light reflected from, or transmitted through, a document (12), is formed by a lens system (20) to a beam (32) which is directed to a series of wavelength selective beam splitters (34) each of which transmits light of greater than a characteristic wavelength and reflects light of lesser wavelength. The characteristic wavelengths of the beam splitters (34) increase or decrease along the series. The resulting output beams (36) are sensed by photosensors (40) to produce electrical signals which are digitized. The resulting data is analyzed, for example, by comparison with corresponding data derived from a genuine document, to provide an output signal on a line (48) indicative of the authenticity of the document (12). <IMAGE>
IPC 1-7
IPC 8 full level
G07D 7/00 (2006.01); G07D 7/06 (2006.01); G07D 7/12 (2006.01)
CPC (source: EP)
G07D 7/06 (2013.01)
Designated contracting state (EPC)
DE ES FR GB IT
DOCDB simple family (publication)
EP 0725375 A2 19960807; EP 0725375 A3 19961218; EP 0725375 B1 19991229; DE 69605828 D1 20000203; DE 69605828 T2 20000727; ES 2140784 T3 20000301; GB 9501921 D0 19950322; JP H08255275 A 19961001; ZA 96699 B 19960819
DOCDB simple family (application)
EP 96300447 A 19960123; DE 69605828 T 19960123; ES 96300447 T 19960123; GB 9501921 A 19950201; JP 1528996 A 19960131; ZA 96699 A 19960130