Device for recognizing authentic documents using optical modulas
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United States of America Patent
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-
May 1, 1990
Grant Date -
N/A
app pub date -
Apr 14, 1989
filing date -
Apr 18, 1988
priority date (Note) -
Expired
status (Latency Note)
Importance
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.
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