Journal
OPTICS EXPRESS
Volume 23, Issue 7, Pages 9233-9251Publisher
OPTICAL SOC AMER
DOI: 10.1364/OE.23.009233
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- Grants-in-Aid for Scientific Research [26600137] Funding Source: KAKEN
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We investigated effects of unresolvable sharp edges on images obtained in a grating-based X-ray differential phase imaging technique. Results of numerical calculations for monochromatic X-rays show that an unresolvable sharp edge generates not only differential-phase contrast but also visibility contrast. The latter shows that the visibility contrast has another major origin other than ultra-small-angle X-ray scattering (USAXS) from randomly distributed unresolvable microstructures, which has been considered the main origin for the contrast. The effects were experimentally confirmed using a synchrotron X-ray source. (C) 2015 Optical Society of America
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