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.
- laser-induced breakdown spectroscopy
- counterfeit coin detection
- British one pound coin
Appleby, A., & Thevar, T. (2016). Identification of British one pound counterfeit coins using laser-induced breakdown spectroscopy. Optical Engineering, 55(4), 1-7. . https://doi.org/10.1117/1.OE.55.4.044104