Instrumentation, Techniques, and Measurement

Identification of British one pound counterfeit coins using laser-induced breakdown spectroscopy

[+] Author Affiliations
Andrew Appleby, Thangavel Thevar

University of Aberdeen, School of Engineering, Fraser Noble Building, Aberdeen AB24 3UE, Scotland, United Kingdom

Opt. Eng. 55(4), 044104 (Apr 21, 2016). doi:10.1117/1.OE.55.4.044104
History: Received November 12, 2015; Accepted March 29, 2016
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Abstract.  The use of laser-induced breakdown spectroscopy (LIBS) as a low-cost, nondestructive method for detecting counterfeit coins was examined. A pulsed laser was used to evaporate a minute amount of coin surface, and the emanating plasma was interrogated with an entry-level spectrometer. The spectra produced showed evidence of lead content in six of the eight counterfeits examined. Thus, LIBS could offer a viable low-cost technique for identifying a significant number of fake coins.

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© 2016 Society of Photo-Optical Instrumentation Engineers

Citation

Andrew Appleby and Thangavel Thevar
"Identification of British one pound counterfeit coins using laser-induced breakdown spectroscopy", Opt. Eng. 55(4), 044104 (Apr 21, 2016). ; http://dx.doi.org/10.1117/1.OE.55.4.044104


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