NCJ Number
219183
Journal
Law Enforcement Technology Volume: 34 Issue: 5 Dated: May 2007 Pages: 26,28,30,32,35
Date Published
May 2007
Length
7 pages
Annotation
This article discusses the law enforcement need for low-light technology and describes the current low-light equipment on the market.
Abstract
Since the terrorist attacks of September 11th, all members of the law enforcement community have become integral in detecting and thwarting terrorist attacks. Low-light technologies that help officers see in darkened conditions give officers an upper hand in detecting criminal activities conducted under the cover of night. The type of low-light equipment necessary varies depending on the goal of the mission and the ambient lighting in the area. Image intensifiers, the most popular and common type of night vision technology, are based on image intensification technology and capable of amplifying visible and near infrared light to achieve better vision. This type of technology is best used in rural settings where ambient lighting is low. Thermal imaging is the next type of low-light technology described. Thermal imaging works independently of ambient lighting and is able to detect far infrared light, which is emitted by all objects in the amount that is proportional to the object’s temperature. While thermal imaging is easy to learn and use, it is not appropriate for making individual identification because the technology limits the details in the image. It is useful, however, when officers need to “see” through barriers such as canvas or tarps. Thermal imaging is also usefully employed in search and rescue missions because the technology can help detect individuals trapped under rubble or other materials. Low-light technology is increasingly available in both monocular and binocular designs. Many officers prefer the monocular design so they can switch to natural vision when necessary. The author notes the struggle to keep low-light technology out of the hands of criminals and briefly describes future research toward more advanced types of low-light technology. The article contains a textbox that discusses the legal limitations to thermal imaging. Exhibits