Sample phase gradient and fringe phase shift in dual phase grating X-ray interferometry

Autor:	Yan, Aimin, Wu, Xizeng, Liu, Hong
Rok vydání:	2019
Předmět:	Physics - Medical Physics Electrical Engineering and Systems Science - Image and Video Processing Physics - Optics
Druh dokumentu:	Working Paper
DOI:	10.1364/OE.27.035437
Popis:	One of the key tasks in grating based x-ray phase contrast imaging is to accurately retrieve local phase gradients of a sample from measured intensity fringe shifts. To fulfill this task in dual phase grating interferometry, one needs to know the exact mathematical relationship between the two. In this work, using intuitive analysis of the sample-generated fringe shifts based on the beat pattern formation mechanism, the authors derived the formulas relating sample's phase gradients to fringe phase shifts. These formulas provide also a design optimization tool for dual phase grating interferometry. Comment: submitted to Optics Express for review
Databáze:	arXiv
Externí odkaz:	http://arxiv.org/abs/1906.08833 Zobrazit plný text záznamu View this record from Arxiv