超高斯光束在自由空间中的衍射传播，利用角谱理论。-Super-Gaussian beam diffraction propagation in free space, the use of the angular spectrum theory.

We propose a novel fluorescence emission difference microscopy (FED) system based on focusing cy- lindrical vector beams. In conventional FED, a Gaussian beam and a 0–2 π vortex phase plate are used to generate solid and hollow spots. We focus ra