物理学报Issue(7)：078701-1-078701-11,11.DOI:10.7498/aps.63.078701
二维光栅角度信号响应函数研究
Resp onse function of angle signal in two-dimensional grating imaging
摘要
Abstract
In this paper, we derive the response function of angle signal in a two-dimensional X-ray grating interferometry system under the condition of parallel coherent light, and depict the surface of the function with Matlab.Although there are four kinds of commonly used beam splitter gratings and three kinds of analyzer gratings, and there are still different compound modes between them, we may find that the ultimate surface of the response function of angle signal can only be of three kinds: the peak type, the valley type, and the peak-valley symmetry type of shifting surfaces. As there is a numerical complementary ralationship between the peak type and the valley type of shifting surfaces, we can take the two kinds as one;and finally we only need to consider two kinds of shifting surface.This conclusion simplies the common understanding of the two-dimensional X-ray grating interferometry method, and lays the foundation for the research of quantitatively extracting the two-demensional signal in the future.关键词
光栅剪切成像/相位衬度成像/位移曲面/位移曲线Key words
two-dimensional X-ray grating interferometry/phase contrast imaging/shifting surface/shifting curve引用本文复制引用
鞠在强,吴自玉,王研,鲍园,李盼云,朱中柱,张凯,黄万霞,袁清习,朱佩平..二维光栅角度信号响应函数研究[J].物理学报,2014,(7):078701-1-078701-11,11.基金项目
国家重点基础研究专项经费(批准号:2012CB825800)、国家自然科学基金(批准号:11205189,11375225, U1332109)和中科院知识创新项目(批准号：KJCX2-YW-N42)资助的课题.* Project partly supported by the National Basic Research Program of China (Grant No.2012CB825800), the National Natural Science Foundation of China (Grant Nos.11205189,11375225, U1332109), and the Knowledge Innovation Program of the Chinese Academy of Sciences (Grant No. KJCX2-YW-N42) （批准号:2012CB825800）
