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NCJRS Abstract

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NCJ Number: 136517 Find in a Library
Title: Ultraviolet Forensic Imaging
Journal: FBI Law Enforcement Bulletin  Volume:61  Issue:5  Dated:(May 1992)  Pages:14-16
Author(s): M H West; R E Barsley
Date Published: 1992
Page Count: 3
Sponsoring Agency: National Institute of Justice/
Rockville, MD 20849
NCJRS Photocopy Services
Rockville, MD 20849-6000
Sale Source: National Institute of Justice/
NCJRS paper reproduction
Box 6000, Dept F
Rockville, MD 20849
United States of America

NCJRS Photocopy Services
Box 6000
Rockville, MD 20849-6000
United States of America
Document: PDF
Type: Training (Aid/Material)
Format: Article
Language: English
Country: United States of America
Annotation: Ultraviolet (UV) light allows investigators and forensic researchers to examine clues and recover evidence that could not have been previously detected.
Abstract: UV light provides more detail and contrast to an injured area, including bite marks, than standard lighting techniques. There are two techniques for UV photography. In one method, known as reflective UV imaging, the wound is flooded with UV light, and the reflected UV image is photographed. An UV bandpass filter mounted on the camera lens blocks all light returning to the film except UV. In the second method, called fluorescent UV imaging, the wound is flooded with only UV light; however, a different filter is used to block all UV rays returning to the camera, so that only the visible light colors fluorescing from the wound will be captured on the film. Photographs done with these techniques show wounds in greater detail than would be possible with conventional photographic equipment; they reveal images of wounds that could not be seen by the naked eye. UV technology can also be used to scan a body or a crime scene for evidence not detectable by the naked eye. A video intensifier tube, which is sensitive to light waves from the UV spectrum through the infrared, can be modified to detect only UV light waves. The resulting images are displayed on a video screen within the device which can be linked to other video equipment, such as a standard video cassette recorder, a graphics computer, or a conventional camera for still photographs. Use of the intensifier and VCR allows investigators and forensic researchers to visualize an ultraviolet image immediately without waiting for film to be developed.
Main Term(s): Ultraviolet techniques
Index Term(s): Dental analysis; Evidence collection; Photography techniques
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