An integrated phase-resolved fluorescence imaging system with sub-nanosecond lifetime resolution

Z. X. Chao, L. K. Seah, V. M. Murukeshan, U. S. Dinish, C. S. Tan

Research output: Journal PublicationArticlepeer-review

2 Citations (Scopus)


In this paper, a novel configuration of an integrated phase-resolved (PR) fingerprint fluorescence imaging system is proposed and implemented. In this integrated PR imaging system, a current modulated 402 nm dual diode laser is proposed to be the light source, to obtain both high laser power and easy modulability. To estimate the lifetime resolution of this PR imaging system, a novel method of using distance-selective suppression of fluorescence signals from two identical fluorescing samples is proposed. Detailed theoretical and experimental analyses are presented. The experimental results demonstrate that this integrated PR imaging system has a lifetime resolution of 0.1 ns. Fingerprint detection experiments are also carried out using this system with latent fingerprints deposited on substrates of aluminum foil and currency.

Original languageEnglish
Pages (from-to)864-870
Number of pages7
JournalOptics and Laser Technology
Issue number4
Publication statusPublished - Jun 2007
Externally publishedYes


  • Fingerprint detection
  • Lifetime resolution
  • Phase-resolved fluorescence imaging

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Atomic and Molecular Physics, and Optics
  • Electrical and Electronic Engineering


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