Faster Fingerprint Detection: A New Infrared Scan Method

In forensics, detecting, segmenting, and visualizing latent fingerprints is crucial but time-consuming. Traditional methods involve destructive physical and chemical processes that can take hours to analyze a single fingerprint. Recently, a new laser-based technology has been developed to speed up this process. This method uses mid-infrared wavelengths (2-4 µm) to non-destructively record and analyze fingerprints in just seconds.The optical system in the MIR scanner breaks down the chemical composition at crime scenes, enabling molecule-dependent analysis. This means even invisible fingerprints can be identified and linked to perpetrators or crime details. Compared to previous methods like FTIR imaging, this new scanner is faster and more efficient. It's been tested on real crime objects, showing promising results.