本文在[1,2]所提出的平面屏系统中光传播的矩阵理论和[3]中有关设想的基础上,首次提出和计算了一个这类新的光学元件的具体设计。这类元件的基本性质是:任意轴对称的高阶光束模通过一系列这类元件后,其输出波场中都几乎只包含基光束模成分。显然,这里面实现了某种把高阶光束模转变为基光束模的变换。因此,我们把这类光学元件称为光束模变换屏。虽然本文的设计还远不够理想:能量损耗太大,单个屏的模转换效率太低。但我们毕竟用一个具体的例子,从理论上证实了这类新的光学元件的可能性。

Based on the matrix theory for the light propagation in a system consisting of plane screens [1, 2] and the relevant idea [3] proposed by one of the authors, an initial design for a new kind of optical elements is first presented here. Its main feature is that regardless of the order of the input light beam mode with axial symmetry, after passing through a sequence of these elements the output light wave will be nearly a fundamental mode. Obviously, some action to transform the high order modes of light beam into the fundamental mode should take place here. Hence was named "the screen for transformation of light beam modes". Although our desing is not satisfactory, the energy losses are too large, it has been shown that there is great possibility of developing this new kind of optical element.