LEAN: laser-etched aqua number

Karel J. Schell

doi:10.1117/12.304692

1 April 1998 LEAN: laser-etched aqua number

Karel J. Schell

Proceedings Volume 3314, Optical Security and Counterfeit Deterrence Techniques II; (1998) https://doi.org/10.1117/12.304692
Event: Photonics West '98 Electronic Imaging, 1998, San Jose, CA, United States

Abstract

A security device on a banknote has to be recognized immediately by the general public and has to enable the general public to establish the genuineness of the banknote. This is the so-called first line of defense. Recently the development of the ability to establish the genuiness has gained momentum and is called 'self authenticating.' Comparing the banknote number with a 'watermark number' can do authenticating. The watermark number is engraved by a laser beam in the paper and is -- as the printed number -- different for each note. Recent progress in the material processing by laser enables the engraving of the individual watermark number for each banknote in line with the production process.

Citation Download Citation

Karel J. Schell "LEAN: laser-etched aqua number", Proc. SPIE 3314, Optical Security and Counterfeit Deterrence Techniques II, (1 April 1998); https://doi.org/10.1117/12.304692

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