圆柱和球坐标系下光学变换的计算机推导

Qian Xu, Jun Ding, Chenjiang Guo, X. Hou, P. Niu, Zhixia Wei
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摘要

本文用计算机代数系统(CAS)对柱面和球坐标系下光学变换的推导进行了符号分析。在电磁斗篷或掩模的设计中,对于对称和简单的形状,我们可以方便直接地得到它们的解析解。然而,当我们处理任意形状时,必须采用数值分析方法(FDTD或FEM等),这不可避免地将区域离散成网格。由于笛卡尔坐标系中的公式已经可用,因此有必要将其推广到柱系和球系。果然,最后用计算机代数系统maple给出了它们。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Computer derivation of the optical transformation in cylindrical and spherical coordinates
We present a symbolic analysis on the derivation of optical transformation in cylindrical and spherical coordinates using computer algebra system (CAS). In the design of electromagnetic cloak or mask, for symmetric and simple shapes, we can easily and directly obtain their analytical solutions. However, when we deal with arbitrary shapes, we must resort to numerical analysis methods (FDTD or FEM, etc.), in which it is inevitable to discretize the region into mesh. Since the formulas in Cartesian coordinate are available already, it is necessary to generalize them to cylindrical and spherical systems. As expected, they are finally given using computer algebra system-Maple.
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