自二十世纪三十年代电子显微镜问世以来,放大倍数从12倍已达到一百万倍;分辨本领已高到惊人的1.44A°。人们为了观察到微小的物体及其结构,并且希望从样品中得到更多的信息,近来又取得了一些新的进展。最高分辨本领及观察原子图象。直接观察单个原子,是人们长期追求的目标。1978年 T.Nats-uda 等人拍摄出了镍(Ni)半间距晶格条纹([220] Since the advent of electron microscopy in the 1930s, the magnification has reached a million times from 12 times; the resolving power has soared to an astonishing 1.44 °. People have recently made some new progress in order to observe tiny objects and their structures, and hope to get more information from their samples. Highest resolution skills and observation of atomic images. Direct observation of a single atom, is the long-sought goal. In 1978, T. Nats-Uda and others photographed half-pitch Ni (Ni) lattice stripes ([220]