中国物理B ›› 2007, Vol. 16 ›› Issue (6): 1632-1636.doi: 10.1088/1009-1963/16/6/024

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Visibility in differential phase-contrast imaging with partial coherence source

刘鑫1, 郭金川2, 彭翔2, 牛憨笨2   

  1. (1)Institute of Optoelectronics Science and Engineering, Huazhong University of Science and Technology, Wuhan 430074, China;Institute of Optoelectronics, Shenzhen University, Key Laboratory of Optoelectronic Devices and Systems of Ministry of Education, Sh; (2)Institute of Optoelectronics, Shenzhen University, Key Laboratory of Optoelectronic Devices and Systems of Ministry of Education, Shenzhen 518060, China
  • 收稿日期:2006-09-13 修回日期:2006-10-12 出版日期:2007-06-20 发布日期:2007-06-20
  • 基金资助:
    Project supported by the State Key Program of National Natural Science of China (Grant No 60532090).

Visibility in differential phase-contrast imaging with partial coherence source

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)†   

  1. a Institute of Optoelectronics Science and Engineering, Huazhong University of Science and Technology, Wuhan 430074, China; b Institute of Optoelectronics, Shenzhen University, Key Laboratory of Optoelectronic Devices and Systems of Ministry of Education, Shenzhen 518060, China
  • Received:2006-09-13 Revised:2006-10-12 Online:2007-06-20 Published:2007-06-20
  • Supported by:
    Project supported by the State Key Program of National Natural Science of China (Grant No 60532090).

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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.

关键词: visibility, differential phase-contrast, interference fringes, phase grating

Abstract: 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.

Key words: visibility, differential phase-contrast, interference fringes, phase grating

中图分类号:  (X- and γ-ray sources, mirrors, gratings, and detectors)

  • 07.85.Fv