Development of latent fingerprint detection based on UV induced fluorescence

Interpol review of fingermarks and other body impressions 2016–2019

“…280–530 nm, max. 440 nm for aged marks) [ 494 ], deflectometry combined with windowed Fourier transform analysis to image latent marks on specular surface [ 495 ], optical setup involving two light sources and a mirror to capture fingermarks left on curved items [ 496 ], polarization imaging detection of fingermarks by using active polarized light and multi-angle recording [ 497 ], short-wave UV fluorescence of sebum-rich secretions induced by a two-dimensional laser scanning system [ 498 ]. Lenses and filters : the combined use of a narrow bandpass filter centred at 560 nm (FF-1.0, Arrowhead Forensics) and a standard orange barrier filter (Coherent 1153747) allowed the observation in luminescence of unprocessed fingermarks when excited with a 532 nm laser (TracER, Coherent Inc.) or a Flare Plus 2505 nm LED (Rofin Forensic) [ 499 ].…”