Infrared seekers are missile subsystems that use the infrared (IR) light emission from a target and its background to detect and track it until the target is destroyed. Since the operational requirements (target/background, mission scenarios, etc.), environmental conditions (aerothermal effects, natural background radiation, in-flight vibration values, etc.), and design limitations (weight, power, activation time, etc.) of seekers are extremely challenging compared to other thermal imaging systems, system and subsystem level design processes must be carried out according to the specific missile applications. 

Infrared Seeker Technologies