title: Retrieval of a complex-valued object from its diffraction pattern.
abstract: It is commonly understood that the retrieval of a complex-valued object from its diffraction pattern using a support constraint is a difficult problem, the more so if the support is symmetric. In this Letter we show that, for just such a symmetric support, use of an iterative algorithm in which the basic iteration is specified by a difference map converges routinely. All that is required is sufficient oversampling in the diffraction pattern coupled with judicious choices of the parameters defining the difference map.
authors.affiliation: School of Physics, University of Melbourne, Victoria 3010, Australia.
authors.forename: W
authors.initials: W
authors.lastname: McBride
authors.forename: N L
authors.initials: NL
authors.lastname: O'Leary
authors.forename: L J
authors.initials: LJ
authors.lastname: Allen