Mastropietro F, Carbone D, Diaz A, Eymery J, Sentenac A, Metzger T H, Chamard V, Favre-Nicolin V
SP2M / UMR-E CEA / UJF-Grenoble 1, INAC, Grenoble, F-38054, France.
Opt Express. 2011 Sep 26;19(20):19223-32. doi: 10.1364/OE.19.019223.
A detailed characterization of the coherent x-ray wavefront produced by a partially illuminated Fresnel zone plate is presented. We show, by numerical and experimental approaches, how the beam size and the focal depth are strongly influenced by the illumination conditions, while the phase of the focal spot remains constant. These results confirm that the partial illumination can be used for coherent diffraction experiments. Finally, we demonstrate the possibility of reconstructing the complex-valued illumination function by simple measurement of the far field intensity in the specific case of partial illumination.
本文对部分照明菲涅耳波带片产生的相干X射线波前进行了详细表征。我们通过数值和实验方法表明，光束尺寸和焦深如何受到照明条件的强烈影响，而焦点的相位保持不变。这些结果证实了部分照明可用于相干衍射实验。最后，我们证明了在部分照明的特定情况下，通过简单测量远场强度来重建复值照明函数的可能性。
