TY - JOUR
TI - Laser photothermal diagnostics of genuine and counterfeit British and United States banknotes
AU - Othonos, A.
AU - Mandelis, A.
AU - Nestoros, M.
AU - Christofides, C.
JO - Optical Engineering
PY - 1997
VL - 36
TODO - 2
SP - 400-407
PB - SPIE/International Society of Optical Engineering
SN - 0091-3286, 1560-2303
TODO - 10.1117/1.601212
TODO - null
TODO - Laser-induced, frequency-scanned IR photothermal radiometry was used to investigate the thermophysical properties of the paper on which several genuine and counterfeit British (£10) and U.S. ($50, $100) currency bills were printed. The radiometric photothermal amplitudes and phases were further compared with a theoretical model, which yielded simultaneous quantitative measurements of the thermal diffusivities and conductivities of the bills. Both statistical and single-specimen results demonstrated the excellent thermophysical resolution of the technique with prospects for its use in the nonintrusive, on-line identification of counterfeit banknotes. © 1997 Society of Photo-Optical Instrumentation Engineers.
ER -