Forensic Light Sources
Light is one of the most valuable tools for a fingerprint examiner. The first step in any processing sequence, regardless of the substrate, is a visual examination with oblique white light. Further examination with various forensic light sources is conducted throughout the processing sequences. Specific wavelengths of light are used to visualize fluorescent fingerprint reagents and powders, and for use with tools such as the Reflective Ultra Violet Imaging System (RUVIS). Fluorescence must be viewed and photographed with the appropriate barrier filter.