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NCJRS Abstract

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NCJ Number: 183933 Find in a Library
Title: Scanning Beam Time-Resolved Imaging System for Fingerprint Detection
Journal: Journal of Forensic Sciences  Volume:45  Issue:3  Dated:May 2000  Pages:563-567
Author(s): Robert D. Roorda M.Sc.; Alfonso C. Ribes Ph.D.; Savvas Damaskinos Ph.D.; A. E. (Ted) Dixon Ph.D.; E. Roland Menzel Ph.D.
Date Published: May 2000
Page Count: 5
Type: Report (Technical)
Format: Article
Language: English
Country: United States of America
Annotation: This article describes a scanning beam time-resolved imaging system for fingerprint detection.
Abstract: The article describes a highly sensitive confocal scanning-beam system for time-resolved imaging of fingerprints. Time-resolved imaging is a relatively new forensic procedure for the detection and imaging of latent fingerprints on fluorescent substrates such as paper, cardboard and fluorescent paint. Ordinary fluorescent imaging of latent fingerprints on these surfaces results in poor contrast. Instead, the specimens are treated with a phosphorescent dye that preferentially adheres to the fingerprint, permitting time-resolved discrimination between the fingerprint phosphorescence and the background fluorescence. Time-resolved images are obtained by synchronizing the digital sampling of the specimen luminescence with the on-off cycle of the chopped illumination beam. The merit of this technique is illustrated with high contrast images of fingerprints obtained from the fluorescent painted surface of a soda can. Figures, references
Main Term(s): Police
Index Term(s): Crime laboratories; Evidence identification; Fingerprint detection techniques; Fingerprint image quality; Fingerprints; Forensic sciences; Latent fingerprints; Science and Technology; Scientific techniques
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