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对不同载体上不同沾染物的指纹印迹特征用410～710nm可调谐激光进行荧光再现，再用滤色片将激光滤除，从而摄取清晰的指纹印迹荧光照片。
Fingerprints of different contaminants on different carriers were fluorescently reproduced with a tunable laser of 410 to 710 nm, and the laser was filtered with a color filter to obtain a clear fingerprint imprinted fluorescence photograph.