论文部分内容阅读
本文提出一种新的静电电子透镜——双曲透镜。该透镜的特点是沿轴电位为抛物线,因而空间电位分布为旋转双曲面。其优点是可以构成纯发散透镜,且象差较现有各种类型的电子透镜小。
In this paper, a new kind of electrostatic lens - hyperbolic lens is proposed. The lens is characterized by a parabola along the axis potential, so the spatial potential distribution is a hyperbolic surface. The advantage is that it can form purely divergent lenses with less aberrations than any existing type of electron lens.