OVERVIEW: FLIR (Forward-Looking Infrared) is a passive thermal imaging system that detects infrared radiation (heat) to generate real-time imagery, enabling detection, recognition, and tracking of targets in complete darkness or obscured environments.

GENERAL DESCRIPTION: These 2nd generation FLIR systems utilized improved detector arrays and cooling technologies, enabling higher resolution and faster image refresh rates in the mid-infrared band. Widely deployed from the 1980s to early 2000s on aircraft, ships, and ground vehicles, they provided clearer thermal imagery under diverse conditions, supporting targeting, surveillance, and situational awareness. Although now mostly superseded, they represented a significant advancement in IR imaging capabilities.

ROLE SUMMARY:
Category: Infrared Imaging Systems
Primary Use: Night vision, target detection, navigation, and fire control support
Function: Thermal image generation using cooled mid-IR detectors
Platform: Fixed-wing aircraft, helicopters, naval vessels, armored vehicles
Integration: Integrated with fire control, navigation, and targeting systems

See Specific information under [Sensors/EW] and [Properties] sections.

SOURCE:
https://en.wikipedia.org/wiki/Forward-looking_infrared
Military Infrared Imaging Technical Papers