The problem of parameter inversion in inhomogeneous medium was studied and a generalized ray approximation method to inverse 2-d medium parameters was introduced in this paper.
对非均匀介质参数反演问题进行了研究，并提出了用于反演二维介质参数的广义射线近似方法。
According to the ray optics, the imaging properties of optical arrays areanalysed. A general imaging transfer matrix including a special case:paraxial ray approximation is obtained.
由非傍轴光线光学理论出发，分析了光学元件列阵的成像特性，得到了普适的成像特性变换矩阵，该结论自动地包含了傍轴近似的情形。
According to the ray optics, the imaging properties of optical arrays areanalysed. A general imaging transfer matrix including a special case:paraxial ray approximation is obtained.
由非傍轴光线光学理论出发，分析了光学元件列阵的成像特性，得到了普适的成像特性变换矩阵，该结论自动地包含了傍轴近似的情形。
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