21 April 2016 Identification of British one pound counterfeit coins using laser-induced breakdown spectroscopy
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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.
© 2016 Society of Photo-Optical Instrumentation Engineers (SPIE)
Andrew Appleby, 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 . Submission:
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