In this paper the mtf system , using a new counting method and cmos sensor as device for image reception , is discussed in detail 本文详细讨论了一种采用全新计算方法，并以cmos为图像接收器件的调制传递函数测量系统。
By using knife edge as object , and cmos sensor as device for image analyzing , we get edge spread function from the image and use differential operation and fft to obtain modulation transfer function of the lens , then its image quality is known 以刀口作为目标物，以cmos作为图像分析器件，从图像中获取刀口函数，经微分和fft运算，得到成像镜头的mtf (调制传递函数) ，从而得知其成像品质。
The advantages and disadvantages of three kinds of models such as , mtf model and psf model are given on the basis of comparing each model . as a result , ray tracing model and mtf model are integrated as the mathematic model of this paper 通过对三种成像仿真模型光线跟踪模型、调制传递函数模型和点扩散函数模型的比较，分析了它们各自的优缺点，从而确定调制传递函数模型和光线跟踪模型结合起来作为本文的仿真模型。
And the specification of binoculars and digital camera are analyzed in - depth . on the base of analysis , the three key specifications are proposed . the three key specifications are : resolution , field of view matching and the mtf of image sensor 为此,首先对数码望远镜的原理和特点进行了深入分析,并对望远镜和数码相机检验的各项指标进行了详细比较,在此基础上提出了适合于数码望远镜性能检验的三个关键指标:分辨率、视场匹配度和图像传感器的调制传递函数。
On the basis of increasing the flaw resolution of the x - ray radiographic system , the study is firstly concerned with the analysis made on the influence of such factors as redial sources energy , system noise , optics radiography and scattering on the radiographic system in theory , and the present dissertation looks at the methods for acquiring the radiographic system point sp read function , line spread function and module transfer function ( mtf ) . on the basis of these studies , research the spread properties of the tiny flaw making use of mtf , acquiring the properties of system inspecting sensitivity and resolution , based on the system optimization designing 本文以提高射线成像系统的疵病分辨率为前提，首先在理论上对射线源能量、系统噪声、光学成像、散射等各环节对成像系统的影响进行分析，探讨成像系统的点扩展函数、线扩展函数及其调制传递函数( moduletransferfunction ，简称mtf )获取方法，在此基础上，利用mtf研究微小疵病的扩展特点，从而得到系统的检测灵敏度和分辨率给出关系特性，为系统优化设计提供依据。
Finally , the relation between the field of view matching of digital binoculars and the size of field of view of binoculars and camera is analyzed theoretically . based on the analysis of the mft principal and measure method of image sensor ’ s mtf , the contact measure method using rectangle template for mtf of image sensor is created . according to the number of pixels of image sensor in one cycle of the template function , the quantitive relation between sine template and rectangle template is proposed through theoretical analysis and comparison 并利用衍射理论,从模板的形式(正弦形、矩形) 、模板与传感器间距等几个关键因素出发,进行了深入的理论探讨,从理论上导出了矩形模板和正弦模板的差异、模板与图像传感器光敏面存在间距的情况下的光场分布;并最终导出了间距存在下图像传感器调制传递函数值测得值与标准值之间的调整系数,利用此调整系数对实验数据进行修正后可得到更为准确的调制传递函数。
Through describing the space sampling process of ccd , the composing factors of modulate transfer function ( mtf ) of ccd integral sampling process are analyzed . meanwhile , an effective method to analyze the mtf of discrete sampling image system is put forward and is used to analyze and compare mtfs of sub - pixel image system and singlechip ccd system . as a result , definitions of ccd optical transfer function ( otf ) and optical mtf are presented and effective methods to measure ccd mtf are brought forward 本文通过对ccd器件空间采样过程的描述，详细分析了ccd积分采样过程调制传递函数的构成要素，提出了分析离散采样成像系统调制传递函数的有效方法，并用该方法分析比较了亚像元成像系统与单片ccd系统的mtf ，给出了ccd器件光学传递函数（ otf ）和光学调制传递函数（ mtf ）的定义，提出了检测ccd调制传递函数有效方法，采用几种不同测量方法测定了tdiccd的调制传递函数，并进行了比较分析。
