Volume 30, Issue 2 (April 1985)
Comparison of Argon-Ion, Copper-Vapor, and Frequency-Doubled Neodymium: Yttrium Aluminum Garnet (ND:YAG) Lasers for Latent Fingerprint Development
Argon-ion. copper-vapor, and frequency-doubled neodymium: yttrium aluminum garnet (Nd:YAG) lasers have been examined for efficiency in latent fingerprint detection. All three types of laser are found to be effective. Argon-ion lasers have the greatest power and range of useful wavelengths while frequency-doubled Nd:YAG lasers offer crime scene capability. On rare occasions latent prints observable under the argon-ion laser are not visually discernible under the Nd:YAG laser, but can be located with a sensitive television camera. Once located, photography of such prints is straightforward.