Device and method for verifying the authenticity of banknotes

Claims a device for detecting the paper truth device and method. The device comprises a light source, a transversal plate is used for processing in the paper to stimulate the fluorescent the light, and a fluorescent detector, a processing is examined the fluorescent is detecting the paper sending out. According to the invention, the results of the light source is a light-emitting diode, and diode is at least one is a comprises an ultraviolet light in a partial spectrum domain. Method for treating comprising a reflection and detecting tool for detecting the bill the fluorescent and is the fluorescent and the threshold value relativity for detecting to position of. According to the invention, the is results wherein the fluorescent for detecting to position out from the light source shutdown detecting the environmental light according to position of the metal. To the permits while the simple operation eliminating the measuring error.