H-C-G光束通过光阑-像散透镜的焦开关现象  

Focal Switch Phenomenon of H-C-G Beams Passing Through a System with the Aperture and Astigmatic Lens Separated

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》2007年第5期32-34,44,共4页Journal of putian University

摘　　要：研究了H-C-G光束通过光阑-像散透镜分离系统的焦开关现象,尤其研究了透镜的像散对焦开关的影响,结果表明:当系统参数和光束参数满足一定的条件时,H-C-G光束通过光阑-像散透镜分离系统后,可能出现两个焦开关现象,甚至可能有三个焦开关的出现。We investigate the focal switch phenomenon of a H-C-G beams passing through a system with the aperture and astigmatic lens separated. The influence of astigmatic on the focal switch is analyzed in detail. When the parameters of system and beams are satisfied with a certain condition, the results demonstrate that, there possibly appears the phenomenon of the dual focal switches or three focal switches.

关 键 词：H-C-G光束 光阑-像散透镜分离系统 像散系数 焦移 焦开关 

分 类 号：O43[机械工程—光学工程]