Ptychography: a strange name for a powerful concept
Andy Maiden (University of Sheffield, UK)
Where coherent diffractive imaging retrieves a quantitative phase image of a specimen from a single diffraction pattern, ptychography (pronounced tie-cog-ra-fee) relies on many patterns gathered under different experimental conditions to meet the same goal. In this talk, I will explain the many advantages of this apparent complication, describe some of the many ways that ptychography can be implemented at different wavelengths, and illustrate the iterative algorithms that we use to build a phase image from the diffraction data. I will also tell the story behind the strange name of the technique.