【作者】 张明丽；

【导师】 宋敏；

【作者基本信息】 辽宁师范大学 ， 课程与教学论， 2002， 硕士

【摘要】 电荷耦合器件(CCD- Charge Coupled Device)是一种新型的成像器件，由于它具有许多优于其它成像器件的特点，其应用领域已被不断地扩展。调制传递函数(MTF—Modulation Transfer Function)作为客观评价其成像质量的可靠方法亟待研究。而以往的理想情况下的MTF模型很难全面客观地评价CCD器件的真实质量。本文从CCD的工作机理出发找出影响CCD的MTF的主要因素，即入射信号与CCD像元之间的位相匹配、像元几何形状、载流子扩散和不完全的电荷转移及沟道类型，并在前人工作的基础上，对诸因素进行分别研究，获得CCD传递函数的综合模型，并与理想情况下CCD的MTF模型进行了比较。更多还原

【Abstract】 Comprehensive Analysis for the Factors Affecting Modulation Transfer Function of Charge Coupled DeviceThe charge-coupled device (CCD) is a very versatile image-forming device. CCDs have a number of advantages over other image-forming devices, and in recent years have been used in many fields. Modulation transfer function (MTF), as a reliable method for evaluating CCDs’ image-forming quality objectively, needs researching urgently. However, it is difficult to evaluate CCDs’ actual quality roundly and objectively by the present MTF model under ideal conditions. In this dissertation starting with CCD’s mechanism, the author gives the primary <WP=51>factors which affect the modulation transfer function of CCD. These are: the phase matching between input signal and CCD pixel, pixel geometry, minority carrier diffusion, transfer efficiency less than unity and channel types, and basing on the work of the predecessor the author researches each factor and acquires the complete MTF model of CCD. Finally this model is compared with CCD’s MTF under ideal conditions.更多还原