Method and apparatus for validating bank notes

Method and apparatus for validating bank notes

A banknote validator takes both reflection and transmission optical measurements at different wavelengths. An emitter and sensor on one side of the banknote path are used to make a calibration measurement using light reflected from a window on the other side of the path, overlying another optical de...

Ausführliche Beschreibung

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Bibliographische Detailangaben
1. Verfasser: VOSER CHRISTIAN
Format: Patent
Sprache:eng
Schlagworte:
CALCULATING
CHECKING-DEVICES
COMPUTING
COUNTING
HANDLING OF COINS OR OF PAPER CURRENCY OR SIMILAR VALUABLEPAPERS, e.g. TESTING, SORTING BY DENOMINATIONS, COUNTING,DISPENSING, CHANGING OR DEPOSITING
HANDLING RECORD CARRIERS
PHYSICS
PRESENTATION OF DATA
RECOGNITION OF DATA
RECORD CARRIERS
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Beschreibung
Zusammenfassung:A banknote validator takes both reflection and transmission optical measurements at different wavelengths. An emitter and sensor on one side of the banknote path are used to make a calibration measurement using light reflected from a window on the other side of the path, overlying another optical device. Each measurement is normalised on the basis of multiple measurements of different wavelengths, distributed over a substantial area, such as along the relevant scan line, preferably using a value representing the dispersion of the measurements.