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Omnidirectional scattering- and bidirectional phase-sensitivity with single shot grating interferometry
专利权人:
PAUL SCHERRER INSTITUT
发明人:
Matias Kagias,Marco Stampanoni,Zhentian Wang
申请号:
US15755215
公开号:
US10514342B2
申请日:
2016.07.20
申请国别(地区):
US
年份:
2019
代理人:
摘要:
X-ray scattering imaging can provide complementary information about the unresolved microstructures of a sample. The scattering signal can be accessed with various methods based on coherent illumination, which span from self-imaging to speckle scanning. The directional sensitivity of the existing methods is limited to a few directions on the imaging plane and it requires the scanning of the optical components, or the rotation of either the sample or the imaging setup, if the full range of possible scattering directions is desired. A new arrangement is provided that allows the simultaneous acquisition of the scattering images in all possible directions in a single shot. This is achieved by a specialized phase grating and a device for recording the generated interference fringe with sufficient spatial resolution. The technique decouples the sample dark-field signal with the sample orientation, which can be crucial for medical and industrial applications.
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