Giesecke & Devrient Gmbh

Giesecke+devrient Currency Technology Gmbh

Martin Clara

Wolfgang Deckenbach

Michael Bloss

Thomas Giering

Thomas Happ

Johann Kecht

Wolfgang Rauscher

Martin Stark

Julia Danhof

Hans-Peter Ehrl

Ulf Ehrhardt

Michael Bloß

A method and a sensor for checking documents are provided in which the same detector is used for a remission measurement and a luminescence measurement of the value document. The remission measurement value being detected during the illumination of the value document with an excitation light used for luminescence excitation, and the luminescence measurement value after switching off the illumination. In order to reduce a distortion of the remission measurement value by the luminescence, a spectral detection filter is incorporated into the detection ray path, which has a transmission of at least 0.5% in the spectral region of the excitation light. The increased transmission of the spectral detection filter achieves that the excitation intensity impinging on the detector far exceeds the luminescence intensity occurring simultaneously with the excitation and thus reduces the mentioned distortion.

Method and sensor for testing documents

The invention relates to an apparatus and a method for checking value documents marked with feature substances, and to the corresponding feature substances. The feature substances are detected on the basis of Raman or SERS spectroscopy also at high transport speeds with a spatial resolution in the low millimeter region or better and reliably identified.

Device and method for verifying feature substances

A sensor device for spectrally resolved capture of optical detection radiation which emanates from a value document transported through a capture area of the sensor device, includes a detection device for spectrally resolved detection of the detection radiation and emission of detection signals which represent at least one property of the detection radiation, at least one reference radiation device which emits optical reference radiation which is coupled into a detection beam path of the detection device and which has a spectrum with a structure which is within the spectral detection range, and which has a radiation source which acts as the transmitter of a light barrier or of a light scanner by means of which barrier or scanner a motion and/or a position of the value document relative to the capture area is capturable, and a control/evaluation device which is configured for receiving detection signals from the detection device, evaluating them and emitting evaluation signals in dependence on the result of the evaluation, and which is further configured for employing detection signals which represent the property of the reference radiation, for checking and/or for adjusting the detection device and/or for making available correction data which are employable in the evaluation of detection signals which represent the at least one property of detection radiation emanating from the value document.

Sensor device for the spectrally resolved capture of valuable documents and a corresponding method

There is described a sensor device for spectrally resolved capture of optical detection radiation which emanates from a value document transported through a capture area of the sensor device in a predefined transport direction, comprising a detection device for spectrally resolved detection of the detection radiation in at least one predefined spectral detection range and emission of detection signals which represent at least one, in particular spectral, property of the detected detection radiation, at least one reference radiation device which emits optical reference radiation which is coupled into a detection beam path of the detection device at least partly in dependence on the position of a value document relative to the capture area, and which has a spectrum with a narrow band which is within the predefined spectral detection range, and/or at least one spectrum with an edge which is within the predefined spectral detection range, and a control and evaluation device which is configured for employing the detection signals which represent the property of the reference radiation, for checking and/or for adjusting the detection device and/or in the evaluation of detection signals which represent the at least one property of detection radiation emanating from the value document.

An apparatus for optical analysis of at least one value document () in a recording area () of the apparatus has an illumination device () for illuminating the value document () in the recording area () and possessing at least one surface emitting laser diode (), a control device () for driving the laser diode (), and a detection device () for recording optical radiation from the recording area ().

Apparatus and method for the optical examination of value documents

A method and apparatus for checking luminescent value documents, in particular bank notes, with a luminescence sensor. The value document to be checked is irradiated to excite luminescence radiation, and the luminescence radiation emanating from the value document is detected with spectral resolution. Since the value document to be checked is transported past the luminescence sensor in the transport direction and is illuminated with an illumination area which extends in the transport direction, an effective measurement is possible even of value documents that emit very little luminescence radiation.

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Munich, Germany

Martin Clara