Comparative analysis of phase extraction methods based on phase-stepping and shifting curve in grating interferometry  

作　　者：刘小松 李恩荣 朱佩平 刘宜晋 张凯 王志立 洪友丽 张慧滔 袁清习 黄万霞 吴自玉 

机构地区：[1]Institute of High Energy Physics,Chinese Academy of Sciences [2]Department of Physics,University of Science and Technology of China [3]School of Mathematical Sciences,Capital Normal University [4]National Synchrotron Radiation Laboratory,University of Science and Technology of China

出　　处：《Chinese Physics B》2010年第4期173-179,共7页中国物理B（英文版）

基　　金：Project supported by the Key Program of the National Natural Science Foundation of China(Grant Nos.10490194 and 10734070); the National Natural Science Foundation of China(Grant Nos.10504033,10774144 and 10979055);the Knowledge Innovation Program of the Chinese Academy of Sciences(Grant No.KJCX2-YW-N42);the National Basic Research Program of China (Grant No.2009CB930804);the National Outstanding Youth Fund(Grant No.10125523)

摘　　要：Two phase extraction methods which are based separately on phase-stepping and shifting curve are mainly used in phase-sensitive imaging in gating interferometry to determine the x-ray phase shift induced by an object in the beam. In this paper, the authors perform a full comparative analysis and present the main virtues and limitations of these two methods according to the theoretical analysis of the grating interferometry.Two phase extraction methods which are based separately on phase-stepping and shifting curve are mainly used in phase-sensitive imaging in gating interferometry to determine the x-ray phase shift induced by an object in the beam. In this paper, the authors perform a full comparative analysis and present the main virtues and limitations of these two methods according to the theoretical analysis of the grating interferometry.

关 键 词：x-ray phase sensitive imaging grating interferometer phase-stepping shifting curve 

分 类 号：O436.1[机械工程—光学工程]