(1) Reconnaissance and detection capabilities under various actual combat distances Aerospace remote sensors can observe ground targets at a space height of more than 100km, and the working distance of the early warning detection system is between thousands of meters to tens of kilometers; the missile guidance distance is 20km to thousands of kilometers, etc. Therefore, the military infrared imaging system should have a corresponding large field of view (such as ±30°~near hemisphere observation space), high sensitivity (such as NETD value of 005~010x10-K), and high spatial resolution (such as 01~0.5mrad) and high frame rate (such as 100~200 frames/s).

(2) Automatic identification, tracking and anti-jamming capabilities Air and space targets, ground targets, and maritime targets have their own unique radiation characteristics (spectral characteristics, radiation intensity and shape characteristics); radiation characteristics (spectrum and radiation intensity of background and interference objects) and shape) will be different; all kinds of targets have certain regularity in their movement postures under combat conditions, while it is difficult for interfering objects to show exactly the same relative movement laws. Two-color and multi-color monitoring and fusion, high definition and high spatial resolution to obtain object radiation and shape characteristics, and real-time detection of object motion posture, is the necessary basis for automatic target recognition, tracking and anti-interference capabilities.

(3) Ability to work under various meteorological and complex environmental conditions The infrared imaging system should have the functions of multi-band switching and adaptive filtering.

(4) The sensitivity non-uniformity and high blind element rate of staring area array devices with high reliability and low cost are big problems. Although it is possible to study the method of non-uniformity correction to solve it properly, there are always certain limitations. In recent years, the quantum well detectors that have been hotly researched have high sensitivity consistency and low blind element rate, which can improve the reliability of system operation and the cost of eye detectors is low.