Lens-free coherent modulation imaging with collimated illumination
Lens-free coherent modulation imaging with collimated illumination
复制标题
DOI：
10.3788/col201614.071203
复制
发表时间：
2016-07
影响因子：
3.5
通讯作者：
H. Tao;S. Veetil;X. Pan;Cheng Liu;Jianqiang Zhu
中科院分区：
文献类型：
--
作者：
H. Tao;S. Veetil;X. Pan;Cheng Liu;Jianqiang Zhu
我们提出了一种无透镜相干调制成像（CMI）方法，用于从单帧衍射图案重建一般复值波场。在迭代重建过程中引入数值傅里叶变换来代替当前CMI技术中使用的透镜或波带片，以采用对样本出射波场的傅里叶分量的约束。虽然通过用数值处理替换波带片和附加配件显着降低了实验装置的复杂性，但也可以避免由波带片的不期望的衍射级引起的能量注量损失。该技术的可行性通过可见光实验验证。
We propose a lens-free coherent modulation imaging (CMI) method for reconstructing a general complex-valued wave field from a single frame of a diffraction pattern. A numerical Fourier transform is introduced in the iterative reconstruction process to replace the lens or zone plate used in the current CMI technique to adopt the constraint on the Fourier components of the exit wave field of the sample. While the complexity of the experimental setup is remarkably reduced by replacing the zone plate and additional accessories with the numerical processing, the energy fluence loss induced by the undesired diffraction orders of the zone plate can be also avoided. The feasibility of the proposed technique is verified experimentally with visible light.