Giesecke & Devrient Gmbh

Giesecke+devrient Currency Technology Gmbh

Hans-Peter Ehrl

Wolfgang Deckenbach

Michael Bloss

Thomas Giering

Martin Clara

Achim Philipp

Erich Kerst

Werner Heimann

Michael Bloß

The invention relates to a sensor for checking value documents with a detection device having at least two photodetectors through which the detection light of the value document is detectable in at least two different spectral regions. The detection device contains a collecting optic common to the photodetectors, through which the detection light emitted by the value document in a detection region can be collimated to a light beam. Each of the photodetectors has associated therewith a detector lens which receives a partial light beam of the light beam collimated by the collecting optic and directs it onto the respective photodetector, so that the detection region substantially coincides for the different photodetectors. By the sensor there can be detected different spectral portions of the detection light of the same detection region separately from each other at the same point in time.

Sensor for checking value documents

The invention relates to a checking unit for checking a material web and to a calibrating method for the checking unit. The checking unit is equipped with drive means for transporting the calibration medium past the checking unit in order to detect a multiplicity of measurement values of the calibration medium. The drive means are arranged in the housing of the checking unit in order for the drive means to be protected from moisture or contaminants from the environment. To obtain a transporting of the calibration medium past the checking unit in spite of the arrangement of the drive means in the housing, drive means are employed that are configured for a contactless interaction with the calibration medium and can transport the calibration medium past the checking unit contactlessly. For this purpose there is preferably used a magnetic interaction between the drive means and the calibration medium.

Checking unit and method for calibrating a checking unit

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.

Device and method for verifying value documents

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Wolfratshausen, Germany

Hans-Peter Ehrl