Optics: measuring and testing – By monitoring of webs or thread
Reexamination Certificate
2005-08-16
2009-11-24
Toatley, Jr., Gregory J (Department: 2877)
Optics: measuring and testing
By monitoring of webs or thread
C356S239200
Reexamination Certificate
active
07623244
ABSTRACT:
The present invention relates to an apparatus (1) for examining documents (2), in particular banknotes. Therein the apparatus (1) comprises at least one light source (3), at least one spectral device (8) and at least two detection devices (9, 10, 11, 24). By means of the light source (3) the document (2) is irradiated and the light emitted and/or reflected and/or transmitted by the document (2) is subsequently divided into spectral components by means of the spectral device (8). The spectral components are separately detected by the detection devices. The spectral division of the light (4) emanating from the light source (3) can also be carried out before the light impinges on the document (2). The apparatus (1) is designed so as to individually weight the spectral components to be detected respectively by the detection devices (9, 10, 11, 24).
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Stein Dieter
Wunderer Bernd
Bacon & Thomas PLLC
Giesecke & Devrient GmbH
Toatley Jr. Gregory J
Underwood Jarreas C.
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