- Forward-looking infrared, or FLIR, is a term used to describe thermal imaging units that measure the infrared energy emitted by objects and lifeforms and interpret it as visual data.
- FLIR's infrared imaging is similar in concept to conventional night vision systems, without the need for a minimal amount of light. Night vision is encumbered by total darkness, or anything that might obscure visibility, like dust or fog. FLIR is still effective under these conditions.
- FLIR systems were first developed by the United States Navy to assist with identifying and targeting enemy forces. The technology allowed for spotting enemy ships even in heavy fog or on extremely dark nights.
- The earliest FLIR systems were large and expensive; however, over the years the systems have been successfully scaled down so that they could be used on aircraft, naval vessels, ground vehicles and, more recently, handheld units.
- Outside of military application, FLIR is used in a variety of ways. Law enforcement agencies and fire departments have used the technology for years to assist in investigations, pursuits and rescues. FLIR is also used in industrial and commercial markets.
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