Holography with customizable reference

Fourier transform holography retrieves microscopic images encoding in the X-ray scattered wave the interference between a known reference and the sample. The presented algorithm allows reconstruction from customizable references that can be designed in order to optimize signal from each particular sample, overcoming the limitations of standard holography geometries.

Martin et al., Nature Communications 5, 4661 (2014).

Holography with customizable reference

The wave scattered by the reference is treated as an a priori known component and put with the diffraction pattern in a set of linear equations to be solved numerically to retrieve the sample image. Extended curved shapes have been chosen to show as a proof of principle that the system works with a broad range of reference kinds, not limited to the usual dot, edge and corner holography.

The obtained holographic images can be used to define the initial domain and parameters of a phase retrieval algorithm to reconstruct high resolution coherent diffraction image of the sample and the reference, partially overcoming the problem of missing data at the center of the diffraction pattern.

Holographic images were obtained from diffraction patterns obtained both in integrative acquisitions with attenuated FEL pulses and in full power single shot experiments.


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X-ray holography with a customizable reference.

A.V. Martin, A.J. D’Alfonso, F. Wang, R. Bean, F. Capotondi, R.A. Kirian, E. Pedersoli, L. Raimondi, F. Stellato, C.H. Yoon, H.N. Chapman.

Nature Communications 5, 4661 (2014).

DOI: 10.1038/ncomms5661

Last Updated on Monday, 21 December 2015 10:57