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

Andrew Appleby; Thangavel Thevar

doi:10.1117/1.OE.55.4.044104

21 April 2016 Identification of British one pound counterfeit coins using laser-induced breakdown spectroscopy

Andrew Appleby, Thangavel Thevar

Author Affiliations +

Optical Engineering, Vol. 55, Issue 4, 044104 (April 2016). https://doi.org/10.1117/1.OE.55.4.044104

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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Andrew Appleby and Thangavel Thevar "Identification of British one pound counterfeit coins using laser-induced breakdown spectroscopy," Optical Engineering 55(4), 044104 (21 April 2016). https://doi.org/10.1117/1.OE.55.4.044104

Published: 21 April 2016

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