Coherent diffractive imaging and partial coherence
Coherent diffractive imaging and partial coherence
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DOI：
10.1103/physrevb.75.104102
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发表时间：
2007-03
影响因子：
3.7
通讯作者：
Garth J. Williams;H. Quiney;A. Peele;K. Nugent
中科院分区：
文献类型：
--
作者：
Garth J. Williams;H. Quiney;A. Peele;K. Nugent
我们在部分空间相干衍射的框架中制定相干衍射成像。我们发现重建可能严重依赖于照明场的相干程度，即使与完全相干的微小偏离也可能使有限支撑的出射表面波与远场衍射图案之间存在映射的传统假设无效。我们证明，在照明中引入足够的相位曲率可以克服部分相干的不利影响。
We formulate coherent diffractive imaging in the framework of partially spatially coherent diffraction. We find that the reconstruction can be critically dependent on the degree of coherence in the illuminating field and that even a small departure from full coherence may invalidate the conventional assumption that a mapping exists between an exit surface wave of finite support and a far field diffraction pattern. We demonstrate that the introduction of sufficient phase curvature in the illumination can overcome the adverse effects of partial coherence.