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众所周知,成象系统的传递函数系由调制传递函数[有时也叫做频率对比特性和相位传递函数所构成。引用这两种函数能够以对应于一系列空间频率参数所测定的调制传递函数和相位位移来表征系统的质量。成象系统除了光学组件(物镜)之外,还可能有光能接收器(如照相器材)电子部件(电子光学图象变换器、电视通道、电荷电路仪器)、荧光屏、纤维光学元件以及其他部件。
It is well known that the transfer function of an imaging system consists of a modulation transfer function [also sometimes referred to as the frequency contrast characteristic and the phase transfer function. Both of these functions can be used to characterize the quality of the system with the modulation transfer function and the phase shift as determined by a series of spatial frequency parameters. Imaging systems In addition to the optical components (objectives), there may be optical receivers (such as photographic equipment) electronic components (electro-optical image converters, television channels, charge-circuit devices), fluorescent screens, fiber optics and other components .