我们发现:(1)在平滑非均匀介质中单个高斯射束即是射线近似的格林函数在解析延拓后的旁轴近似(paraxial approximation),这种延拓是通过将源点放在复空间而得到的.格林函数的高斯射束近似具有在计算效率和稳定性方面的优点.
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non-paraxial approximation 非傍轴近似
scalar paraxial approximation 傍轴标量近似
paraxial approximation theory 近轴近似
paraxial axial approximation 旁轴近似
paraxial ray approximation 旁轴射线近似
Under paraxial approximation, the transfer matrix and imaging formula of left-handed slab focusing system is derived by the law of refraction. Using ABCD law, the propagation expressions for Gaussian beam focused by a left-handed material slab are obtained.
利用折射定律获得了傍轴近似条件下左手材料平板透镜的成像公式和ABCD矩阵,然后由ABCD定律导出了高斯光束在左手材料平板透镜内部和像空间的传输公式。
参考来源 - 人工电磁材料的光学特性及应用研究·2,447,543篇论文数据，部分数据来源于NoteExpress
以上来源于: WordNet
The early research was based on the scalar approximation and paraxial approximation.
早期的自聚焦研究是在考虑了傍轴近似和标量场近似的前提下得到的。
Furthermore, the conditions have been given that Gaussian beam is a paraxial approximation solution of the wave equation.
进一步指出了高斯光束作为波动方程傍轴近似解的条件。
In this paper, it is analyzed the propagation of a Gaussian beam in fiber media with ray tracing under the paraxial approximation.
利用光线追踪方法在近轴近似下模拟了高斯光束在不同折射率分布纤维状介质中的传播。
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