螺旋型波带片成像的空间分辨率研究  

Study on the spatial resolution of spiral zone plate imaging

作　　者：易涛[1] 曹磊峰[1] 刘慎业[1] 杨国洪[1] 谢常青[2] 朱效立[2] 董建军[1] 

机构地区：[1]中国工程物理研究院激光聚变研究中心,四川绵阳621900 [2]中国科学院微电子所,北京100029

出　　处：《光电子．激光》2010年第7期1089-1092,共4页Journal of Optoelectronics·Laser

基　　金：国家自然科学基金资助项目(10727504);中物院激光聚变研究中心和等离子体物理国家级重点实验室创新基金资助项目

摘　　要：研究了1阶螺旋型波带片(SZP)的聚焦特性,提出了一种数值计算SZP空间分辨率的方法。通过数值计算获得SZP的聚焦特性曲线,计算出SZP对刀边图形的响应曲线,根据响应曲线并结合光学相干叠加原理,确定SZP的空间分辨率。理论分析得到模拟计算和实验结果的验证。Spiral zone plate is a diffractive optical element which can realize optical differential filtering and the edge enhancement imaging.The focusing properties of spiral zone plate with topological charge 1 are studied and a method to calculate its spatial resolution is presented.The focusing property of spiral zone plate can be obtained by numerical calculation and according to the focusing property,the knife edge imaging can be calculated.Combining with the coherent imaging principle,the spatial resolution of spiral zone plate can be determined.The simulation and experimental results agree well with our theoretical prediction.

关 键 词：螺旋型波带片(SZP) 边缘增强 空间分辨率 

分 类 号：O436[机械工程—光学工程]