光电成象系统对目标欠抽样成象时 ,高频细节不但无法分辨 ,还将混淆低频成分 .介绍一种新的实现光电成象系统超分辨率的方法———微变焦法 ,即利用放大率可变光学系统 ,获得多帧不同抽样频率下的混淆图象 ,然后重建成一帧混淆减少、分辨率提高的图象 .计算机模拟和实验结果都表明了微变焦方法能够简便、有效地提高光电成象系统的分辨率 When the electro-optical imaging system underexamples the target, the high-frequency details can not be distinguished and the low-frequency components will be confused.A new method to realize the super-resolution of the electro-optical imaging system --- micro-zoom method is introduced, Rate variable optical system to obtain confusion images with different sampling frequencies of multiple frames and then reconstruct an image with reduced confusion and improved resolution.Computer simulations and experimental results show that the micro-zoom method can easily and effectively improve the photoelectric Imaging system resolution