In this paper, we conduct a simulation research on the filtering effects of various far-field spatial filters (including pinhole filter and various slit filters) and point out that there are obvious filtering differences among them under some conditions, which are always considered to be basically the same, and explain their formation mechanism. The result has certain significance for the slit filters with excellent performance to be applied in high-power lasers.

中文翻译：

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远场空间滤波器的滤波差异和解释

在本文中，我们对各种远场空间滤波器（包括针孔滤波器和各种狭缝滤波器）的滤波效果进行了仿真研究，并指出在某些条件下它们之间存在明显的滤波差异，这些差异通常被认为是基本相同，并解释其形成机理。该结果对于应用于大功率激光器的具有优异性能的狭缝滤光片具有一定的意义。