Detection and Evaluation of Security Features Embedded in Paper Using Spectral-Domain Optical Coherence Tomography

作者：Fujiwara Kazuo^*; Matoba Osamu

来源：Optical Review, 2011, 18(1): 171-175.

DOI：10.1007/s10043-011-0018-y

• optical coherence tomography
• SD-OCT
• valuable paper sheet
• authentication
• security feature
• security thread
• cross-sectional structural characteristic

We propose a new method for authenticating valuable paper sheets such as gift coupons, tickets, and cheques with the use of optical coherence tomography (OCT). This method is based on the detection and evaluation of cross-sectional structural characteristics of valuable paper sheets provided with security features. Commonly used as a security feature is a security thread, which is embedded in such paper sheets. In this paper, the nondestructive detection of the embedded security thread is demonstrated using spectral-domain OCT. The results showed that the security thread was clearly visualized in the OCT image despite the highly scattering nature of papers.

• 出版日期2011-1