使用matlab语言对高斯光束通过薄透镜聚焦仿真

Metalenses at visible wavelengths:Diffraction-limited focusing and subwavelength resolution imaging使用FDTD仿真脚本文件

最大对比度法自聚焦（Contrast Optimization Autofocus,COA）准则：选取每个聚焦深度内对比度最大的距离门为参考信号，搜索使该距离门信号成像结果聚焦比最大的fdr作为估计结果

Flat-topped beam theoretical model and unified theory of coherence and polarization of light are used as the bases in examining aberrated, partially coherent, electromagnetic, square, flat-topped pulsed beams focused by a thin lens. This study demonstrates that Astigmatism is not necessarily undesirable in certain circumstances, and a certain amount of astigmatism can be guaranteed a similar spatial envelope of the beams in the geometric focal plane as the source of aberrated, partially coherent