The infrared detector is the core component of the infrared thermal imager. It is made of polysilicon or VOX material, 8-14um infrared long wave, and has a strong ability to penetrate fog. It does not need to rely on illumination light and ambient light, but is generated by the radiation of the target and the background. Scene image, work 24 hours a day, and will not be disturbed by strong visible light like other night vision equipment, and the lifespan of uncooled infrared thermal imager can reach 45,000 hours, much higher than the 1,000 hours of ordinary infrared lamps and laser lighting of 10,000 hours. The detection distance is also from 100 meters to the observation of people over 3 kilometers and vehicles over 6 kilometers, and the detection of aircraft tail flames over 100 kilometers. Our product RB20 multi-purpose detector is accurate and clear for the detection of human targets within 300 meters, but its own weight is less than 300g; RB3225P is more than 8km for the early warning detection of 9*9m target hidden fire points in the forest; EC1100 model uses three generations of 640 *512 refrigerated detector achieves stable and ultra-long-distance 24-hour detection through optical path improvement, and reaches more than 40km for ship targets.