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| Identification of True and Counterfeit Hundred RMB of the 2005 Edition Based on Transmitted THz Pulse Imaging |
| LIU Hai-ling1, ZHAI Dong-wei1, YANG Yu-ping1*, CUI Bin1, ZHANG Zhen-wei2, ZHANG Cun-lin2 |
1. School of Science, Minzu University of China, Beijing 100081, China
2. Department of Physics, Beijing Advanced Innovation Center for Imaging Technology, Beijing Key Laboratory for Terahertz Spectroscopy and Imaging, Key Laboratory of Terahertz Optoelectronics, Ministry of Education, Capital Normal University, Beijing 100048, China |
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Abstract Due to the different production material and process between real and counterfeit paper currency, we identified the true and counterfeit hundred RMB of the 2005 edition based on transmitted THz pulse imaging. The point-to-point terahertz pulse imaging technique was used to scan two feature anti-counterfeit area, white watermark and holographic safety margin. Based on the obtained time-domain data and the corresponding frequency-domain data, the THz images with time-domain display mode and frequency-domain display mode were mapped. The difference of imaging effect is obvious at white watermark area and safety line area, which confirm that the transmission terahertz pulse imaging technique can truly and effectively carry out multi-regional and multi-dimensional authenticating true and counterfeiting RMB.
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Received: 2017-08-12
Accepted: 2017-12-28
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Corresponding Authors:
YANG Yu-ping
E-mail: ypyang_cun@126.com
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