Modified x-ray polymer refractive cross lens with adiabatic contraction and its realization
Modified x-ray polymer refractive cross lens with adiabatic contraction and its realization
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DOI：
10.1088/0960-1317/25/5/055010
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发表时间：
2015-04
影响因子：
2.3
通讯作者：
V. Nazmov;J. Mohr;I. Greving;M. Ogurreck;F. Wilde
中科院分区：
文献类型：
--
作者：
V. Nazmov;J. Mohr;I. Greving;M. Ogurreck;F. Wilde
提出了一种具有减小的焦距的折射X射线透镜，这是由于设计孔径在透镜的长度上连续减小。这些透镜元件具有类似于几何棱镜的折射抛物面侧壁，根据X射线传播定律，这些折射抛物面侧壁在透镜的长度上具有变化的横截面。由于初始X射线束指向焦点的事实，并且由于侧壁表面的折射性质引起的相位延迟，聚焦效应直接发生在透镜中。具有不同光学参数的这样的绝热透镜元件的阵列被布置在由聚合物微结构表示的多个行中，已经使用X射线光刻法产生。透镜的初步测试在18.6 keV的光子能量下产生了67 nm的焦斑。
A refractive x-ray lens with reduced focal length, due to continuous reduction in the designed aperture over the length of the lens, is presented. The lens elements have refractive parabolic sidewalls like geometrical prisms, with a varying cross section over the length of the lens, in accordance with the x-ray propagation law. The focusing effect occurs directly in the lens due to the fact that the initial x-ray beam is directed toward the focal point, and due to the phase retardation caused by the refractive properties of the sidewall surfaces. An array of such adiabatic lens elements with different optical parameters, arranged in a number of rows, represented by polymer microstructures, has been produced using x-ray lithography. Preliminary testing of the lenses has resulted in a focal spot of 67 nm at a photon energy of 18.6 keV.