由于电荷耦合器件(CCD)具有许多优于其他成像器件的特点,因此其应用领域已被不断地扩展,调制传递函数(MTF)可作为客观评价其成像质量的有效方法。从载流子扩散对其传递函数影响出发,分析其数学模型, 并利用该模型进一步探讨光谱不均匀性,不同扩散长度及初始耗尽宽度对MTF的影响,最后给出了仿真试验结果。

Charge-coupled device (CCD) is widely used in many fields since it has more advantages than other imaging devices. As a reliable objective method for evaluating CCDs′ imaging quality, modulation transfer function (MTF) should be investigated. Proceeding from the effect of the minority carrier diffusion on MTF, the mathematic model was analyzed. The influence of spectrum non-uniformity, different diffusion length and initial depletion width on MTF was further investigated based on the model. The simulation experiment result is given.