Phase retrieval based on wave-front relay and modulation
Phase retrieval based on wave-front relay and modulation
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DOI：
10.1103/physrevb.82.121104
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发表时间：
2010-09
影响因子：
3.7
通讯作者：
Fucai Zhang;J. Rodenburg
中科院分区：
文献类型：
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作者：
Fucai Zhang;J. Rodenburg
我们报道并实验证明了一种从单一衍射图恢复一般复值波场的相位的方法。该方法在数据采集中采用了调制器，大大降低了对探测器动态范围的要求，也极大地方便了逆运算。新算法包含一个非线性模约束，没有歧义，对噪声具有较强的鲁棒性；即使在一个相当宽松的支撑约束下，它也能快速收敛。这种方法为宽辐射范围和所有波长的相干成像提供了一种实用的解决方案。
We report and demonstrate experimentally an approach to retrieving the phase of a general complex-valued wave field from a single diffraction pattern. The approach employs a modulator in its data acquisition, which greatly reduces the dynamic range requirement of the detector and also greatly facilitates the inverse calculation. The new algorithm, involving a nonlinear modulus constraint, is free from ambiguities and robust to noise; it converges rapidly even with a rather loose support constraint. This approach provides a practical solution to coherent imaging with a broad range of radiations and at all wavelengths.