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Phase Retrieval with Ptychography and X-ray Speckles

QUICK INFORMATION
Type
Seminar
Start Date
03-09-2019 13:00
End Date
03-09-2019 14:00
Location
Room 500 - 501, Central Building
Speaker's name
Pierre THIBAULT
Speaker's institute
Department of Physics & Astronomy, University of Southampton, UK
Contact name
Claudine Roméro
Host name
Michael Wulff
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In the last decades, a convergence between X-ray source quality, detector performance and algorithmic developments have led to new imaging schemes in which what is measured can be very different from what we want to see. In these schemes, natural processes – scattering and propagation – encode the information on samples and illuminating conditions, which is then decoded a posteriori. Far from being limiting, these approaches provide access to additional imaging channels and offer flexibility by lifting some experimental constraints. This talk will give an overview of recent developments with a special emphasis on two such imaging strategies: ptychography and speckle-based imaging. These methods have demonstrated their potential for applications, from nanometre-scale computed tomography of materials and life science sample to at-wavelength wavefront sensing for X-ray free-electron lasers. Some of these results will be presented, but the main emphasis will be on the interesting and challenging theoretical and computational components of these approaches.

Visitors from off-site please contact Claudine Roméro tel +33 (0)4 76 88 20 27 to arrange for a gate pass.
Requests made by e-mail will be confirmed.
If you do not receive a confirmation e-mail, please contact us by phone.