紫外荧光信号拾取及鉴别方法研究

Research on the signal pick-up and discriminating method with ultraviolet fluorescent mark ultraviolet fluorescent mark true-false discrimination

当紫外光源照射人民币时,人民币上的紫外荧光标记会被激发出可见光,紫外激发荧光是人民币检伪的重要手段之一。目前紫外荧光标记不但使用在真币上,也常被假币制造者使用,造成人民币检伪的困难。文章讨论一种能鉴别真假币紫外荧光标记的方法———给真假人民币照射固定中心波长的紫外光源,根据真假人民币反射光的细微差别,通过滤光玻璃、光电二极管、对数放大器、差动放大器等电路装置,得到一个以不同电平数值来表示真假人民币的紫外荧光信号。

Exciting fluorescence by ultraviolet radiation is an important method of discriminating false Renminbi. At present, ultraviolet mark not only is used in discriminating true Renminbi, but also is used by the false Renminbi maker, thus making it the diffcult to discriminate false Renminbi.This paper discusses a method of discriminating ultraviolet fluorescent mark in the true or false Renminbi. By irradiating ultraviolet radiation with fixed central wavelength in the true Renminbi, the nuance of reflected light from true or false Renminbi could be founded. With the glass filter, photodiode, logarithm amplifier and differential amplifier, an electrical level value can be obtained to denote the ultraviolet signal of true or false Renminbi.