| 摘要 |
<p>A device for detecting fraudulent negotiable instruments by coating areas (54) of the negotiable instruments with a fluorescent substance that, when subject to ultraviolet light (52), develops an emission of a certain known frequency. The device uses a narrow band pass filter (60) centered on the emission frequency and a scanner (38) to detect fraudulent documents and to cause such fraudulent documents to be rejected (28).</p> |
