Optically-based methods and apparatus for performing document authentication
作者： Nabil M. Lawandy , Timothy J. Driscoll
DOI:
关键词:
摘要: A method for authenticating a document (10). The includes the steps of: (a) providing (10) to be authenticated; (b) illuminating at least portion (12) of with laser light (14) that exceeds threshold fluence; (c) detecting (16) narrow band laser-like emission one wavelength from in response step (14); and (d) declaring authentic only if is detected.
google.co.in 参考文章(4)
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