Applying Anti-Stokes Phosphors in Development of Fingerprints on Surfaces Characterized by Strong Luminescence

• NCJ Number: 237816
• Journal: Journal of Forensic Identification Volume: 62 Issue: 1 Dated: January/February 2012 Pages: 28-35
• Author(s): Bogdan Drabarek; Antoni Siejca; Jaroslaw Moszczynski; Barbara Konior
• Date Published: February 2012
• Length: 8 pages
• Publication Format: Article
• Publication Type: Research (Applied/Empirical)
• Language: English
• Country: United States of America

Annotation

This article examines a proposed method for developing latent prints that is based on multiphoton absorption.

Abstract

Using traditional luminescence methods to develop latent prints becomes problematic when dealing with backgrounds that demonstrate strong luminescence. In such instances, the application of time-resolved luminescence is considered a good solution. However, this technique requires the use of complicated devices that allow short-lived background fluorescence to be chopped off from a longer-lived fingerprint luminescence. This paper discusses a new and straightforward technique for the development of latent prints that involves using pigments with upconversion properties (anti-Stokes phosphors). The method requires an illumination source that emits infrared radiation. (Published Abstract)