Lasers and Optical Spectroscopy in Questioned Document Examination
Timothy W. Sinor, Jeffrey P. Wilde, Kathleen E. Everse, E. Roland Menzel · Journal of Forensic Sciences · 1986
Abstract The use of in situ laser-luminescence and excitation spectroscopy for examination of questioned documents is investigated. It is found that such spectroscopy can at times discriminate between similar inks when conventional methods are unsuccessful. A particularly effective procedure for room temperature luminescence enhancement is presented and compared with luminescence at cryogenic temperatures.