Dong Xue, Pan Xingchen, Liu Cheng, Zhu Jianqiang
Opt Lett. 2018 Apr 15;43(8):1762-1765. doi: 10.1364/OL.43.001762.
A single shot multi-wavelength phase retrieval method is proposed by combining common coherent modulation imaging (CMI) and a low rank mixed-state algorithm together. A radiation beam consisting of multi-wavelength is illuminated on the sample to be observed, and the exiting field is incident on a random phase plate to form speckle patterns, which is the incoherent superposition of diffraction patterns of each wavelength. The exiting complex amplitude of the sample including both the modulus and phase of each wavelength can be reconstructed simultaneously from the recorded diffraction intensity using a low rank mixed-state algorithm. The feasibility of this proposed method was verified with visible light experimentally. This proposed method not only makes CMI realizable with partially coherent illumination but also can extend its application to various traditionally unrelated fields, where several wavelengths should be considered simultaneously.
通过将普通相干调制成像（CMI）和低秩混合态算法相结合，提出了一种单次多波长相位恢复方法。由多波长组成的辐射束照射到待观察的样品上，出射场入射到随机相位板上形成散斑图案，该散斑图案是各波长衍射图案的非相干叠加。利用低秩混合态算法，可从记录的衍射强度中同时重建包含各波长模量和相位的样品出射复振幅。通过实验验证了该方法在可见光下的可行性。该方法不仅使部分相干照明下的CMI得以实现，还可将其应用扩展到各种传统上不相关的领域，在这些领域中需要同时考虑多个波长。
