Theory and verification of moiréfringes for x-ray three-phase grating interferometer  

作　　者：单雨征 葛永帅 杨君 郭大育 蔡学宝 刘晓珂 侯晓文 郭金川 Yu-Zheng Shan;Yong-Shuai Ge;Jun Yang;Da-Yu Guo;Xue-Bao Cai;Xiao-Ke Liu;Xiao-Wen Hou;Jin-Chuan Guo(Key Laboratory of Optoelectronic Devices and Systems of the Ministry of Education,Key Laboratory of Optoelectronic Devices and Systems of the Department of Education,Guangdong Province,College of Physics and Optoelectronic Engineering,Shenzhen University,Shenzhen 518060,China;Research Center for Medical Artificial Intelligence,Shenzhen Institutes of Advanced Technology,Chinese Academy of Sciences,Shenzhen 518055,China;Institute of Advanced Science Facilities,Shenzhen 518107,China;Institute of Electronic Paper Displays,South China Academy of Advanced Optoelectronics,South China Normal University,Guangzhou 510006,China;College of Biophotonics,South China Normal University,Guangzhou 510631,China;MinFound Medical Systems Co.,Ltd.,Hangzhou 310018,China)

机构地区：[1]Key Laboratory of Optoelectronic Devices and Systems of the Ministry of Education,Key Laboratory of Optoelectronic Devices and Systems of the Department of Education,Guangdong Province,College of Physics and Optoelectronic Engineering,Shenzhen University,Shenzhen 518060,China [2]Research Center for Medical Artificial Intelligence,Shenzhen Institutes of Advanced Technology,Chinese Academy of Sciences,Shenzhen 518055,China [3]Institute of Advanced Science Facilities,Shenzhen 518107,China [4]Institute of Electronic Paper Displays,South China Academy of Advanced Optoelectronics,South China Normal University,Guangzhou 510006,China [5]College of Biophotonics,South China Normal University,Guangzhou 510631,China [6]MinFound Medical Systems Co.,Ltd.,Hangzhou 310018,China

出　　处：《Chinese Physics B》2024年第5期532-540,共9页中国物理B（英文版）

基　　金：Project supported by LingChuang Research Project of China National Nuclear Corporation;the National Natural Science Foundation of China(Grant No.12027812)。

摘　　要：Dual-phase and three-phase grating x-ray interference is a promising new technique for grating-based x-ray differential phase contrast imaging.Dual-phase grating interferometers have been relatively completely studied and discussed.In this paper,the corresponding imaging fringe formula of the three-phase grating interferometer is provided.At the same time,the similarities and differences between the three-phase grating interferometer and the dual-phase grating interferometer are investigated and verified,and that the three-phase grating interferometer can produce large-period moiréfringes without using the analyzing grating is demonstrated experimentally.Finally,a simple method of designing three-phase grating and multi-grating imaging systems from geometric optics based on the thin-lens theory of gratings is presented.These theoretical formulas and experimental results provide optimization tools for designing three-phase grating interferometer systems.

关 键 词：x-ray phase contrast phase grating moiréfringe 

分 类 号：O434.1[机械工程—光学工程] TP391.41[理学—光学]