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Proceedings Paper

Magnetic imaging of currencies and secure documents
Author(s): Tomasz M. Jagielinski; Fred Chamberlain
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Paper Abstract

Today the ubiquitous distribution of high technology scanning and printing equipment enables the home user to make counterfeits of high value documents. There is an ever-increasing demand for new technologies and methods to machine authenticate printed documents and safeguard their integrity. Magnetic technology has been used to add hidden information to documents including banknotes, checks, airline tickets, identification cards, and transit documents. A solution to forensics is magnetic imaging where invisible magnetic patterns or recorded information can be displayed as an image for comparison with an optical scan. The use of small, highly sensitive detectors enables high resolution scanning of magnetic documents, creating magnetic images with fine detail. Depending on the design of a document, if the magnetic image is identical to the optical image, the document may be a counterfeit. In this paper, we will address the issues related to magnetic scanning of security documents. We will present and discuss magnetic images of documents printed with magnetic inks. We will also show how magnetic imaging can provide valuable information in understanding the alteration of magnetic data in documents such as tickets, licenses with pictures, and holograms.

Paper Details

Date Published: 19 April 2002
PDF: 10 pages
Proc. SPIE 4677, Optical Security and Counterfeit Deterrence Techniques IV, (19 April 2002); doi: 10.1117/12.462736
Show Author Affiliations
Tomasz M. Jagielinski, San Diego Magnetics, Inc. (United States)
Fred Chamberlain, San Diego Magnetics, Inc. (United States)

Published in SPIE Proceedings Vol. 4677:
Optical Security and Counterfeit Deterrence Techniques IV
Rudolf L. van Renesse, Editor(s)

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