Journal article

Fresnel diffractive imaging: Experimental study of coherence and curvature

LW Whitehead, GJ Williams, HM Quiney, KA Nugent, AG Peele, D Paterson, MD de Jonge, I McNulty

PHYSICAL REVIEW B | AMER PHYSICAL SOC | Published : 2008

Abstract

A Fresnel coherent diffractive imaging experiment is performed using a pinhole as a test object. The experimental parameters of the beam curvature and coherence length of the illuminating radiation are varied to investigate their effects on the reconstruction process. It is found that a sufficient amount of curvature across the sample strongly ameliorates the effects of low coherence, even when the sample size exceeds the coherence length. © 2008 The American Physical Society.