透镜的像散对H-G光束的焦开关影响  

The Effects of Astigmatic Lens on the Focal Switch of the H-G Beams

作　　者：周彩玉[1] 陶向阳[2] 

机构地区：[1]莆田学院电子信息工程系,福建莆田351100 [2]江西师范大学理电学院,江西南昌330022

出　　处：《莆田学院学报》2009年第2期93-96,共4页Journal of putian University

摘　　要：研究了透镜像散对H-G光束的焦开关效应。递推出H-G光束通过光阑-透镜分离系统的轴上光强解析式。结果表明:当透镜存在像散时,焦开关的位置和跳变量均在一定程度上发生改变,透镜的像散程度越高则影响越大。值得注意的是,由于透镜像散的存在,有的模式的光束会有双开关现象的出现。The effects of astigmatic on the H-G beams was studied and the analytical expressions for the axial irradiance of H-G beams and passing through a system with the aperture and astigmatic lens separated were derived. The results demonstrate that transition height and the turning point would change in some degree when the astigmatic exists, and the more astigmatic exists, the more transition height and turning point change. What is worth noting is that dual focal switch presents on some model beams because of astigmatic.

关 键 词：厄米-高斯光束 透镜 像散 光阑-透镜分离系统 焦移 焦开关 

分 类 号：O435[机械工程—光学工程]