Single-frame coherent diffraction imaging of extended objects using triangular aperture
Single-frame coherent diffraction imaging of extended objects using triangular aperture
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DOI：
10.1364/oe.414341
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发表时间：
2021-01-18
期刊：
影响因子：
3.8
通讯作者：
Takahashi, Yukio
中科院分区：
文献类型：
--
作者：
Kang, Jungmin;Takazawa, Shuntaro;Takahashi, Yukio
提出了一种利用三角形光阑进行单帧相干衍射成像的方法，该方法不仅可以从单帧相干衍射图样重建出扩展物体的投影像，而且可以改善探头波场的成像。在这种方法中，平面波照射三角形孔。物体通过透镜直接放置在光圈之后或光圈的像平面中。远场相干衍射图样由二维探测器收集。利用无支撑约束的相位恢复算法，从单帧衍射图中重建出目标图像。我们模拟可行的实验设置在硬X射线制度，并表明这种方法可以实际使用的单帧相干衍射成像。本方法具有潜在的高时空分辨率的同步辐射/自由电子激光在材料科学和生物学中的动力学现象的探索。(C)根据OSA开放获取出版协议的条款，2021年美国光学学会
We propose a method of single-frame coherent diffraction imaging using a triangular aperture, which can not only reconstruct the projection image of extended objects from a single-frame coherent diffraction pattern, but also improve the image of the wavefield of the probe. In this method, a plane-wave illuminates a triangular aperture. An object is placed immediately after the aperture or in the image plane of the aperture through a lens. A far-field coherent diffraction pattern is collected by a two-dimensional detector. The object image is reconstructed from the single-frame diffraction pattern using a phase retrieval algorithm without support constraints. We simulate feasible experimental setups in the hard X-ray regime and show that this method can be practical use for single-frame coherent diffraction imaging. The present method has the potential exploring dynamic phenomena in materials science and biology with high spatiotemporal resolution using synchrotron radiation/free-electron lasers. (C) 2021 Optical Society of America under the terms of the OSA Open Access Publishing Agreement