Ptychography: early history and 3D scattering effects

J. M. Rodenburg

doi:10.1117/12.2008493

11 December 2012 Ptychography: early history and 3D scattering effects

J. M. Rodenburg

Proceedings Volume 8678, Short-Wavelength Imaging and Spectroscopy Sources; 867809 (2012) https://doi.org/10.1117/12.2008493
Event: Short-Wavelength Imaging and Spectroscopy, 2012, Bern, Switzerland

Abstract

The coherent diffractive imaging method of ptychography is first reviewed from a general historical perspective. Much more recent progress in extending the method to the 3D scattering geometry and the super-resolution configuration is also described. Ptychography was originally conceived by Walter Hoppe as a solution to the X-ray or electron crystallography phase problem. Although the existence of this type of phase information was clearly evident in the early 1970s, the technique was not implemented at atomic-scale wavelengths until the 1990s, and then only in a way that was computationally inefficient, especially in view of the limited size of computers at that time. Fast and efficient ptychographic algorithms were developed much later, in the mid-2000s. The extremes of crystallography ptychography, which only requires two diffraction patterns, and the Wigner Distribution Deconvolution (WDDC) method, which needs a diffraction pattern for every pixel of the final reconstruction, are described. Very recent work relating to the application of serial iterative to 3D inversion are also described.

Citation Download Citation

J. M. Rodenburg "Ptychography: early history and 3D scattering effects", Proc. SPIE 8678, Short-Wavelength Imaging and Spectroscopy Sources, 867809 (11 December 2012); https://doi.org/10.1117/12.2008493

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