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在理想情况下,红外探测器的每一列应该具有相同的增益,如果假设每个像素点对相同的黑体辐射温度响应都相等,则最终输出的图像应为一幅非常均匀的图像,但在实际情况中,由于红外探测器焦平面的制作工艺水平以及焦平面材料组分的缺陷,每个像素点对黑体辐射的响应不会完全相同,同时,每个列方向上通道的增益大小也不会完全相同,特别是当列与列之间的差异较为明显时。因此,主要对红外探测器焦平面读出电路中列通道的增益非均匀性情况进行了分析,根据分析结果推导出模拟探测器列通道增益非均匀性的模型,并对拟合曲线进行了精度分析。
Ideally, each column of infrared detectors should have the same gain, and if each pixel is assumed to respond equally to the same black body radiation temperature, the final output image should be a very uniform image, but in practice In this case, the response of each pixel to black body radiation will not be exactly the same due to the fabrication process level of the infrared detector’s focal plane and the defects of the focal plane material components. At the same time, the gain of the channels in each column direction will not be Exactly the same, especially when the difference between columns is more obvious. Therefore, the gain inhomogeneity of the column channel in the infrared detector’s focal plane readout circuit is mainly analyzed. According to the analysis results, a model of gain gain of the detector channel is deduced, and the accuracy of the fitted curve is analyzed. analysis.