随着电子光学仪器分辨率的提高,高级像差的研究日益受到重视,其中计算典型的旋转对称磁透镜的各阶球差系数的计算更显得重要,已有一些成果[1]。我们利用光程函数法推导出了旋转对称电子光学系统的七级几何像差公式[2],给出普适意义下的各像差系数。在此基础上我们进一步计算了 With the improvement of the resolution of electro-optical instruments, higher-order aberrations have drawn more and more attention. The calculation of each spherical aberration coefficient of a typical rotating symmetric magnetic lens is even more important. Some achievements have been made [1]. We use the optical path function method to deduce the seventh-order geometric aberration formula of the rotationally symmetric electro-optical system [2], and give the aberration coefficients in the universal sense. On this basis, we further calculated