Τίτλος:
Laser photothermal diagnostics of genuine and counterfeit British and United States banknotes
Γλώσσες Τεκμηρίου:
Αγγλικά
Περίληψη:
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.
Συγγραφείς:
Othonos, A.
Mandelis, A.
Nestoros, M.
Christofides, C.
Περιοδικό:
Optical Engineering
Εκδότης:
SPIE/International Society of Optical Engineering
