| Abstract:Detector noise equivalent temperature difference (NETD) is a key index to evaluate detector sensitivity. By changing the structure of the readout circuit and improving the charge capability of the readout circuit, the detector NETD is increased from 10mK to less than 1mK. When the noise is less than 1 gray level, the NETD obtained by the existing test method is low, which leads to the high evaluation and recognition distance of the whole machine, which is inconsistent with the actual result. This paper presents an optimization method to make the test results more consistent with the system application index. At the same time, the analysis shows that the detector is more suitable for low-speed targets or relatively static scenes, and compared with conventional detectors, the same optical temperature change affects the detection distance of the detector, and it is recommended that users pay attention to the influence of optical temperature stability. |