Framework for computing the spatial coherence effects of polycapillary x-ray optics

作     者：Zysk, Adam M. Schoonover, Robert W. Xu, Qiaofeng Anastasio, Mark A. 

作者机构：IIT Dept Biomed Engn Med Imaging Res Ctr Chicago IL 60616 USA Washington Univ Dept Biomed Engn St Louis MO 63130 USA 

出 版 物：《OPTICS EXPRESS》 (Opt. Express)

年 卷 期：2012年第20卷第4期

页      面：3975-3982页

核心收录：

学科分类：070207[理学-光学] 07[理学] 08[工学] 0803[工学-光学工程] 0702[理学-物理学] 

基　　金：NIH [CA136102, EB010049, EB009715] NSF [CBET-0546113, CBET-0854430] 

主　　题：Computation methods Far field diffraction Image quality Light propagation Optical devices X ray optics 

摘      要：Despite the extensive use of polycapillary x-ray optics for focusing and collimating applications, there remains a significant need for characterization of the coherence properties of the output wavefield. In this work, we present the first quantitative computational method for calculation of the spatial coherence effects of polycapillary x-ray optical devices. This method employs the coherent mode decomposition of an extended x-ray source, geometric optical propagation of individual wavefield modes through a polycapillary device, output wavefield calculation by ray data resampling onto a uniform grid, and the calculation of spatial coherence properties by way of the spectral degree of coherence. (C) 2012 Optical Society of America