phaseless imaging

Monday, August 14, 2017 - 10:00am - 10:45am
Andreas Menzel (Paul Scherrer Institute)
Ptychography comprises sampling and analyzing the object’s spatial spectrogram by windowed (or “short-space”) Fourier transforms. Its capability to reconstruct both image and illumination, as well as other experimental conditions including instabilities has proven promising for high-resolution X-ray microscopy.
Tuesday, August 15, 2017 - 2:00pm - 2:45pm
James Fienup (University of Rochester)
Phase retrieval has grown in popularity in recent years on account of its success in x-ray coherent diffractive imaging, including ptychography. Our development of phase retrieval for image reconstruction will be reviewed, including both passive and active imaging, in both optics and x-rays, enabling imaging from the nano-scale to the astronomical scale. Iterative transform and nonlinear optimization algorithms will be compared.
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