Use of fluorescence lifetime imaging (FLIM) for latent fingerprints detection

Peng Wang; Zhi Xia Chao; Leong Keey Seah; Vadakke Matham Murukeshan

doi:10.1117/12.621984

12 April 2005 Use of fluorescence lifetime imaging (FLIM) for latent fingerprints detection

Peng Wang, Zhi Xia Chao, Leong Keey Seah, Vadakke Matham Murukeshan

Proceedings Volume 5852, Third International Conference on Experimental Mechanics and Third Conference of the Asian Committee on Experimental Mechanics; (2005) https://doi.org/10.1117/12.621984
Event: Third International Conference on Experimental Mechanics and Third Conference of the Asian Committee on Experimental Mechanics, 2004, -, Singapore

Abstract

Fluorescence lifetime imaging (FLIM) in frequency domain enables the mapping of the spatial distribution of fluorescence lifetimes of a specimen. FLIM can provide unique information about fluorophores and hence is widely used in biology and for medical diagnostics. In this paper, a theoretical analysis for the fluorescence lifetime determination of latent fingerprint samples is described, which is followed by the feasibility study of using FLIM in frequency domain for latent fingerprints detection. Experiments are carried out with fingerprint on green paper substrate and postcard substrate treated with certain fluorescent powder. The total phase lag and demodulation factor are calculated to determine the lifetimes pixel by pixel. The resulting fluorescence lifetime image of fingerprint revealed an improvement in the contrast, and was able to detect the latent fingerprint clearly.

Citation Download Citation

Peng Wang, Zhi Xia Chao, Leong Keey Seah, and Vadakke Matham Murukeshan "Use of fluorescence lifetime imaging (FLIM) for latent fingerprints detection", Proc. SPIE 5852, Third International Conference on Experimental Mechanics and Third Conference of the Asian Committee on Experimental Mechanics, (12 April 2005); https://doi.org/10.1117/12.621984

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KEYWORDS

Luminescence

Fluorescence lifetime imaging

Modulation

Signal detection

Demodulation

Homodyne detection

Phase shift keying

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