%0 Journal Article
%A D’Alfonso, A. J.
%A Morgan, A. J.
%A Martin, A. V.
%A Quiney, H. M.
%A Allen, L. J.
%T Fast deterministic approach to exit-wave reconstruction
%J Physical review / A
%V 85
%N 1
%@ 1050-2947
%C College Park, Md.
%I APS
%M PUBDB-2015-05048
%P 013816
%D 2012
%X We introduce a fast, dependable algorithm to solve for the exit surface wave of a specimen in coherent diffractive imaging for a set of illumination conditions that are not unduly restrictive. It is shown that a direct solution of the phase problem from a diffraction pattern is obtained efficiently and uniquely. The algorithm is deterministic and is known a priori to converge to the correct solution in less than a predetermined number of steps. It is based on the conjugate gradient least-squares method implemented with Fourier transforms and offers the possibility of real-time solutions.We also extend the formulation to allow for imaging of extended objects in a manner similar to ptychography.
%F PUB:(DE-HGF)16
%9 Journal Article
%U <Go to ISI:>//WOS:000299115100006
%R 10.1103/PhysRevA.85.013816
%U https://bib-pubdb1.desy.de/record/288579