Sensor for checking value documents

US9460579B2 · kind B2 · utility

Assignee

• GIESECKE & DEVRIENT GMBH · DE

Inventors

• Wolfgang Deckenbach · Schechen, DE
• Achim Philipp · Munich, DE
• Hans-Peter Ehrl · Erding, DE

Key dates

• Filing date: Oct 31, 2012
• Grant date: Oct 4, 2016
• Expiry date: May 24, 2033

Classification

• Technology area (CPC G): Physics
• CPC primary: G02B19/0076
• WIPO field: Measurement
• WIPO sector: Instruments

Abstract

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.