螺旋型波带片聚焦特性研究  

Study on Focusing Properties of Spiral Zone Plate

作　　者：易涛[1] 杨国洪[1] 韦敏习[1] 刘慎业[1] 朱效立[2] 谢常青[2] 

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：《光学学报》2012年第7期73-77,共5页Acta Optica Sinica

基　　金：国家自然科学基金(11105129);中国工程物理研究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(CX0620091)资助课题

摘　　要：提出了一种计算螺旋型波带片聚焦特性的方法。从衍射积分理论出发对螺旋型波带片的聚集特性进行了理论计算,推导出了级数形式的解析解,获得了螺旋型波带片"空心"焦点的场强分布。利用螺旋型波带片的聚焦特性,对其成像进行了数值模拟和理论分析。理论分析表明螺旋型波带片的空间分辨率与其"空心"焦点的环宽有关。通过验证实验证明理论分析与实验测试一致,为螺旋型波带片成像理论和模拟计算提供了一种有效手段。The theoretical analysis for the focusing properties of spiral zone plate is presented. Using the diffraction theory, focusing properties of spiral zone plate and the series-form expression for the diffracted field near the hollow focus are calculated. Moreover numerical simulation and theoretical analysis for the imaging are also carried out by a spiral zone plate using our theoretical results. It shows that the spatial resolution of a spiral zone plate is associated with the zone width of its hollow focus. Experimental results indicate our theoretical analyses are consistent with the experimental test, which give out an effective method for the imaging analysis and numerical simulation of spiral zone plate.

关 键 词：衍射 螺旋型波带片 聚焦特性 空间分辨率 

分 类 号：O436[机械工程—光学工程]