中国物理B ›› 2007, Vol. 16 ›› Issue (6): 1632-1636.doi: 10.1088/1009-1963/16/6/024
刘鑫1, 郭金川2, 彭翔2, 牛憨笨2
Liu Xin(刘鑫)a)b), Guo Jin-Chuan(郭金川)b), Peng Xiang(彭翔)b), and Niu Han-Ben(牛憨笨)b)†
摘要: 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.
中图分类号: (X- and γ-ray sources, mirrors, gratings, and detectors)