正反馈可以用来补偿光电探测器的内部串联电阳。这种反馈能保证探测器电路的输出电流随光子通量线性变化。这个原理也适用于改善傅里叶变换分光仪和其他光谱成象仪用的红外线探测器的线性。理想的光电探测器没有内部串联电阻,因此导电率与射入的光子通量成比例。如果这个理想的探测器加上一个恒定的偏置电压,那么探测器电流就与光 Positive feedback can be used to compensate for the photodetector’s internal series connection. This feedback ensures that the output current of the detector circuit varies linearly with photon flux. This principle is also suitable for improving the linearity of infrared detectors used in Fourier transform spectrometers and other spectral imaging devices. The ideal photodetector has no internal series resistance, so the conductivity is proportional to the incident photon flux. If this ideal detector plus a constant bias voltage, then the detector current and light