Skip to main content
padlock icon - secure page this page is secure

Detection of Pretreated Fingerprint Fluorescence Using an LED-based Excitation System

Buy Article:

$52.00 + tax (Refund Policy)

Abstract: 

Optimization of a light emitting diode (LED)-based excitation system for the detection of pretreated fingerprint fluorescence is described. Fluorescent ridges can usually be excited by irradiation with forensic light sources such as xenon arc lamps or quartz-halogen lamps with high-power output and suitable filters. However, they are too expensive for many crime laboratories in smaller organizations. We concentrated on LEDs which have advantages over conventional light sources in that they are simpler and of lower cost, but the power output and quality of each individual LED unit is not sufficient for the detection of weak fluorescent ridges. To resolve this subject, blue and green LED arrays composed of ninety LED units were adopted and suitable low pass filters for them were designed. An experimental system, consisting of blue and green LED arrays with the suitable low pass filters for illumination, high pass filters for viewing, a digital camera and a computer, was tested. The fluorescent images of cyanoacrylate ester fumed/rhodamine 6G stained fingerprint on white polyethylene sheet and weak fluorescent ridges of ninhydrin/indium chloride treated fingerprint on white paper were successfully detected and photographed. It was shown that the improvement of LED beam in intensity and quality can compensate the disadvantages, resulting in well-contrasted images.
No References
No Citations
No Supplementary Data
No Article Media
No Metrics

Keywords: LEDs array excitation; cyanoacrylate ester/rhodamine 6G; fingerprint fluorescence; forensic science; low pass filter; ninhydrin/indium chloride

Document Type: Research Article

Affiliations: 1: Forensic Science Laboratory, Hyogo Prefectural Police Headquarters, Kobe, Japan. 2: Identification Division, Hyogo Prefectural Police Headquarters, Kobe, Japan. 3: Japan Analytical Industry Co., Ltd., Tokyo, Japan.

Publication date: July 1, 2008

  • Access Key
  • Free content
  • Partial Free content
  • New content
  • Open access content
  • Partial Open access content
  • Subscribed content
  • Partial Subscribed content
  • Free trial content
Cookie Policy
X
Cookie Policy
Ingenta Connect website makes use of cookies so as to keep track of data that you have filled in. I am Happy with this Find out more