What does FLIR stand for?

• A. Infrared forward-looking system
• B. Forward looking infrared radiation
• C. Forward light infrared recorder
• D. Forward looking infrared

Answer: (D)

FLIR stands for Forward Looking Infrared. The phrase describes a sensor that is oriented ahead of you and uses infrared energy to create images, especially when visible light is poor. The correct expansion matches the order and meaning: Forward (direction of view), Looking (aimed ahead), Infrared (the heat-energy portion of the spectrum used to form the image). It’s common to see confusion with terms like “infrared radiation” or to swap words, but the acronym specifically uses Infrared as a single concept, not Radiation, and it keeps the word order as shown. In the field, FLIR imaging lets you see heat signatures from targets, people, or equipment even at night or through smoke, which is why this designation is standard.