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 1st generation FLIR units employed single-element or linear detector arrays to produce thermal images in the mid-infrared spectrum. Their resolution and sensitivity were limited compared to modern systems, offering basic detection of heat signatures for navigation and targeting in low visibility conditions. Widely used from the 1970s through the 1980s on aircraft, ships, and ground vehicles, these systems laid the foundation for infrared surveillance technology.

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

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

SOURCE:
https://en.wikipedia.org/wiki/Forward-looking_infrared
U.S. Military FLIR Development Reports