Based on the general Huygens-Fresnel diffraction integral formula, the focal switch effect of Hermite-cosine-Gaussian beams passing through an astigmatic lens is investigated in detail.

• 应用惠更斯-菲涅耳衍射积分公式,研究了厄米-余弦-高斯光束通过像散透镜后的焦开关现象。