Device for recognizing authentic documents using optical modulas
AssigneeLGZ Landis & Gyr Zug AG
InventorsChristian Bercovitz, Alexandre Feyjoo
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Abstract
A recognition device for authenticating documents is disclosed. The recognition device comprises a reading head for optically scanning the documents. The reading head includes at least two modules of substantially identical construction, each of which is provided with a line of photosensors. The reading head also includes means for determining the spectral sensitivity of the modules. The recognition device also includes a conveying system for providing relative movement between the reading head and the documents being scanned. An evaluation means correlates signals provided by the photosensors with prestored values to control a sorter which sorts the documents based on their authenticity or falsehood.
Claims11
A device for authenticating documents comprising
- a reading head for optically scanning a document, said reading head including at least two substantially identical modules each of which is provided with a line of photosensors, and means for determining the spectral sensitivity of said modules,
- evaluation means for correlating signals provided by, said photosensors when said photosensors are illuminated with light from a light source with prestored values,
- conveying means for providing relative movement between said reading head and said documents, and
- sorting means controlled by said evaluation means in accordance with a correlation value.
Dependencies are inferred from the claim text.