Structural and optical characterization of banknotes using spectral‐domain optical coherence tomography

Abstract

Counterfeiting of banknotes is a financial crime that severely affects economic security and social stability [1]. The key to combat banknote counterfeiting crimes is to detect and link the counterfeit banknotes to the counterfeiters, which remains a challenge due to the continuous development of printing technologies and scanner systems. The advanced counterfeiting techniques can vividly reproduce multiple security features, such as security thread, intaglio, serial number, watermark, and microtext. Therefore, it is urgent to