基于成像分辨率的光电成像系统抖动要求

Jitter of the Electro-optical System Based on Image-resolution

针对图像抖动导致光电成像系统的成像分辨率降低的问题,提出了一种基于成像分辨率的光电成像系统抖动要求分析方法.根据抖动频率将抖动分为高频抖动与低频抖动,高频抖动按高斯、正弦、线性等三种抖动分布考虑,低频抖动按线性抖动分布考虑,给出了各抖动分布对应的调制传递函数模型,进而建立了含抖动全系统调制传递函数模型.基于成像分辨率要求与调制传递函数模型,给出了抖动要求定量分析方法,并给出了相应分析流程与算法.根据流程,结合特定系统参量,进行了仿真分析,结果表明:在一定成像分辨率条件下,低频视轴抖动可允许值最大,其次为高频线性抖动可允许值,最后为高频正弦与高斯抖动可允许值.

Aiming at the issue that image-resolution of the electro-optical imaging system can be depressed by the image jitter,a ration analysis method of the requirement of jitter was proposed.The jitter was classified into high frequency jitter and low frequency jitter,the high frequency jitter divides into Gauss, sine and linear,the low frequency jitter was defined as linear jitter,the modulation transfer function of them was given,and the modulation transfer function of the whole system was built.Based on the resolution equal notion and the modulation transfer function model,the ration analysis method of the jitter was given,the analysis flow and arithmetic was also presented.At last,the method was simulated through computer based on specially appointed system parameter and the analysis flow.The simulation results indicate that the low frequency linear jitter tolerance is max,the high linear jitter tolerance is next,the high frequency Gauss jitter tolerance and the high frequency sine jitter tolerance is min.