高灵敏度红外系统的需要,引起了高灵敏度(低噪声)探测器的发展。确实,现代红外探测器往往受背景限制。常常可以忽略由光子感应的产生-复合噪声。因此,如果要维持一个系统受背景限制,那么电子处理设备的噪声相对于探测器噪声必须可以忽略。探测器输出的电信号往往是微伏级的,在这种情况下,为保持探测器的灵敏度.不 The need for high sensitivity infrared systems has led to the development of high sensitivity (low noise) detectors. Indeed, modern infrared detectors are often limited by the background. Often, the generation of photon-induced noise can be neglected. Therefore, the noise of the electronic processing device must be negligible relative to the detector noise if one system is to be left with a background constraint. The electrical signals output by the detector are often in the order of micro-volts, in which case the sensitivity of the detector is maintained.