Takeuchi Akihisa, Uesugi Kentaro, Suzuki Yoshio, Itabashi Seiichi, Oda Masatoshi
Japan Synchrotron Radiation Research Institute/SPring-8, Sayo, Hyogo 679-5198, Japan.
NTT Advanced Technology, Atsugi, Kanagawa 243-0124, Japan.
J Synchrotron Radiat. 2017 May 1;24(Pt 3):586-594. doi: 10.1107/S1600577517003289. Epub 2017 Apr 3.
Fresnel zone plates with apodized apertures [apodization FZPs (A-FZPs)] have been developed to realise Gaussian beam optics in the hard X-ray region. The designed zone depth of A-FZPs gradually decreases from the center to peripheral regions. Such a zone structure forms a Gaussian-like smooth-shouldered aperture function which optically behaves as an apodization filter and produces a Gaussian-like focusing spot profile. Optical properties of two types of A-FZP, i.e. a circular type and a one-dimensional type, have been evaluated by using a microbeam knife-edge scan test, and have been carefully compared with those of normal FZP optics. Advantages of using A-FZPs are introduced.
已开发出具有变迹孔径的菲涅耳波带片[变迹菲涅耳波带片（A-FZP）]，以在硬X射线区域实现高斯光束光学。A-FZP的设计波带深度从中心到周边区域逐渐减小。这种波带结构形成了类似高斯的光滑肩部孔径函数，其光学行为类似于变迹滤波器，并产生类似高斯的聚焦光斑轮廓。通过微束刀口扫描测试评估了两种类型的A-FZP（即圆形类型和一维类型）的光学特性，并与普通菲涅耳波带片光学的特性进行了仔细比较。介绍了使用A-FZP的优点。
