| Abstract:When developing high-resolution cooled infrared imager, the frequency of analog signals also increases, which leads to the need to ensure the signal quality of analog signals on the transmission path to ensure the imaging quality of infrared images. In our self-developed 1280×1024@15μm mid-wave infrared camera imaging experiments, we found that the highlighted point source targets in the infrared image appear in pairs, that is, the image appears ghosted, which causes serious interference to the detection and identification of smaller targets. By extracting the analog signal transmission path model and simulation circuit signals and further comparing the infrared imaging images, this paper concludes that the impedance mismatch on the signal transmission path is the main cause of image ghosting, and verifies that when the matching resistance on the transmission path is between 40Ω~70Ω, the signal transmission quality is better, which can eliminate the infrared image ghosting problem. |