Jahn T, Wilke R N, Chushkin Y, Salditt T
University of Göttingen, Institute for X-Ray Physics, Friedrich-Hund-Platz 1, 37077 Göttingen, Germany.
Acta Crystallogr A Found Adv. 2017 Jan 1;73(Pt 1):19-29. doi: 10.1107/S2053273316015114.
This paper presents an investigation of the reconstructibility of coherent X-ray diffractive imaging diffraction patterns for a class of binary random `bitmap' objects. Combining analytical results and numerical simulations, the critical fluence per bitmap pixel is determined, for arbitrary contrast values (absorption level and phase shift), both for the optical near- and far-field. This work extends previous investigations based on information theory, enabling a comparison of the amount of information carried by single photons in different diffraction regimes. The experimental results show an order-of-magnitude agreement.
本文对一类二元随机“位图”物体的相干X射线衍射成像衍射图案的可重构性进行了研究。结合分析结果和数值模拟，针对任意对比度值（吸收水平和相移），确定了光学近场和远场中每个位图像素的临界注量。这项工作扩展了先前基于信息论的研究，能够比较不同衍射区域中单光子携带的信息量。实验结果显示出数量级上的一致性。
