%0 Journal Article
%T Visibility in differential phase-contrast imaging with partial coherence source
%A Liu Xin
%A Guo Jin-Chuan
%A Peng Xiang
%A Niu Han-Ben
%A <br>刘鑫
%A 郭金川
%A 彭翔
%A 牛憨笨
%J 中国物理 B
%D 2007
%I 
%X This paper gives theoretical analysis of visibility of fringes, which is influenced by distances, temporal and spatial coherence of source, in hard x-ray differential phase-contrast imaging with microfocus x-ray source. According to the character of longitudinal periodicity of the interferogram, the setup is insensitive to mechanical drift and vibrations. The effect of temporal coherence of x-ray source is investigated and its related bandwidth is derived. Based on the theory of partially coherent light, it shows that the requirement for the spatial coherence of x-ray source is not strict and can be met by the general microfocus x-ray tube for x-ray differential phase-contrast imaging.
%K visibility
%K differential phase-contrast
%K interference fringes
%K phase grating<br>能见度
%K 相差-对比度成像
%K 边缘
%K 相干点源
%K 干涉图
%U http://www.alljournals.cn/get_abstract_url.aspx?pcid=6E709DC38FA1D09A4B578DD0906875B5B44D4D294832BB8E&cid=47EA7CFDDEBB28E0&jid=CD8D6A6897B9334F09D8D1648C376FB4&aid=51EC29F0F1FE4796D5735D17C877309E&yid=A732AF04DDA03BB3&vid=7801E6FC5AE9020C&iid=B31275AF3241DB2D&sid=06B73AD4ED947C02&eid=FDDE90F0514924E3&journal_id=1009-1963&journal_name=中国物理&referenced_num=0&reference_num=18