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Optical Engineering

Identification of British one pound counterfeit coins using laser-induced breakdown spectroscopy
Author(s): Andrew Appleby; Thangavel Thevar
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Paper 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.

Paper Details

Date Published: 21 April 2016
PDF: 6 pages
Opt. Eng. 55(4) 044104 doi: 10.1117/1.OE.55.4.044104
Published in: Optical Engineering Volume 55, Issue 4
Show Author Affiliations
Andrew Appleby, Univ. of Aberdeen (United Kingdom)
Thangavel Thevar, Univ. of Aberdeen (United Kingdom)

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