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Optical Engineering

Homodyne assisted multistep phase shifting in phase-resolved optical technique for latent fingerprint imaging
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Paper Abstract

A novel homodyne signal processing assisted phase-resolved optical system for the imaging of latent fingerprints is proposed. A multistep phase shifting method is introduced to remove the DC part of the fluorescence signals. Experiments are carried out with simulated fingerprint samples where their lifetime and emission wavelength are in close range to that of background fluorescence. The proposed phase-resolved technique can suppress the background fluorescence provided there is lifetime difference between two emissions.

Paper Details

Date Published: 1 December 2004
PDF: 2 pages
Opt. Eng. 43(12) doi: 10.1117/1.1812326
Published in: Optical Engineering Volume 43, Issue 12
Show Author Affiliations
U. S. Dinish, Nanyang Technological Univ. (Singapore)
Zhixia Chao, Nanyang Technological Univ. (China)
Vadakke Matham Murukeshan, Nanyang Technological Univ. (Singapore)
Leong Keey Seah, Nanyang Technological Univ. (Singapore)

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