Abstract

A method of reconstructing the complex amplitude of an object that is illuminated by a coherent wave from its Fresnel diffraction patterns is proposed for high-frequency wave phenomena such as x-rays and electron waves. A noniterative phase-retrieval method that uses a Gaussian filter is employed here, and it is shown that the object’s illumination with amplitude distribution in the Fraunhofer diffraction pattern of a circular aperture can be used as a substitute for the Gaussian filter. This method has an advantage over other noniterative phase-retrieval methods in that it can retrieve phase vortices.

© 2004 Optical Society of America

Phase retrieval from diffraction intensities by use of a scanning slit aperture

Nobuharu Nakajima
Appl. Opt. 44(29) 6228-6234 (2005)

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Noniterative two-dimensional phase-retrieval method from two Fourier intensities by use of an exponential filter

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