刀边法测量聚焦光场空间结构特性  

Application of knife-edge technique to measurement of spatial structure of focusing spot

作　　者：魏军[1] 王思聪[1] 杨良信[1] 谢向生[1] 周建英[1] 

机构地区：[1]中山大学光电材料与技术国家重点实验室,广州510275

出　　处：《强激光与粒子束》2014年第1期75-79,共5页High Power Laser and Particle Beams

基　　金：国家自然科学基金项目(10934011;61205018);国家重点基础研究发展计划项目(2012CB921900)

摘　　要：研究了测量光场分布的多角度单刀边法和直角双刀边法。分析了两种刀边法测量光斑特性的基本原理。通过数值模拟,对它们在光斑测量过程中的图像还原能力和抗噪声能力进行了理论分析,并对实验中利用直角双刀边法测量得到的结果进行了简要的分析。研究结果表明,多角度单刀边法在测量光斑的实验中,对光斑的还原能力比较有限,而直角双刀边法由于操作简单、还原能力更强,更适合用于光斑的测量。An investigation and analysis of two methods,the muhi-angle knife-edge method and the right-angle doubleknife-edge method,was demonstrated for the light distribution measurement.The basic principles of the two methods were introduced.Their ability of image reconstruction and anti-noise was analyzed by numerical simulation.The experimental result of the spot measurement with the right-angle double knife-edge method was showed.As a conclusion,compared with the multi-angle scanning knife-edge method,the double knife-edge method was more practical for focal spot measurement,especially for the tightly focusing spot.

关 键 词：刀边法 噪声 光斑 

分 类 号：O434[机械工程—光学工程]