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IR-CCD 阵列通常需要对阵列中各单元探测器之间的增益变化效应和偏移变化效应进行补偿。线性补偿技术不能完全满足焦平面要求,这是由于焦平面表现出较大的非线性响应,这种响应率是与阈值光通量及饱和光通量的数量级变化相关的。在混合型 CCD 中,特别是当 HgCdTe 作为探测器材料时,通常会出现这种情况。本文报告了一种应用于 HgCdTe IR-CCD 焦平面上的多点分段折线补偿方案。这种技术可使补偿后的响应按有效计算方式得到。给出了校正点数目和残余固有图象噪声数量之间的实验关系,并与以前的分析模型进行了比较。
The IR-CCD array usually needs to compensate for the effects of gain variation and offset variation between the unit detectors in the array. The linear compensation technique does not fully satisfy the focal plane requirement because the focal plane shows a large nonlinear response that is related to the magnitude of the threshold flux and saturation flux. This is typically the case with hybrid CCDs, especially when using HgCdTe as the detector material. This paper reports a multi-point segment line compensation scheme applied to the HgCdTe IR-CCD focal plane. This technique allows the compensated response to be effectively calculated. The experimental relationship between the number of correction points and the amount of residual intrinsic image noise is given and compared with the previous analysis model.