He Xiaoliang, Liu Cheng, Zhu Jianqiang
Opt Lett. 2018 Jan 15;43(2):214-217. doi: 10.1364/OL.43.000214.
An optical setup and corresponding reconstruction algorithm are proposed to realize single-shot Fourier ptychography (FP). Multiple angle-varied object waves are generated by placing a Dammann grating at a certain distance behind the object, and the generated image array of low resolution corresponding to different diffraction orders formed on the detector plane is recorded simultaneously in a single exposure. The amplitude, as well as the phase information of the object, can be properly reconstructed with a common FP algorithm from the recorded image array. This method eliminates the requirement for the angular scanning of common FP, and the total acquisition time is dramatically reduced. The feasibility of this proposed method was demonstrated both numerically and experimentally. The proposed method has the advantages of fast data acquisition and corresponding high temporal resolution, making it very suitable for applications in which high imaging speed is required.
提出了一种光学装置和相应的重建算法来实现单次傅里叶叠层成像（FP）。通过在物体后方一定距离处放置一个达曼光栅来产生多个角度变化的物波，并且在单次曝光中同时记录在探测器平面上形成的对应于不同衍射级次的低分辨率图像阵列。利用普通的FP算法可以从记录的图像阵列中正确重建物体的幅度以及相位信息。该方法消除了普通FP中角度扫描的要求，并且显著减少了总采集时间。通过数值模拟和实验验证了该方法的可行性。所提出的方法具有数据采集速度快和相应的高时间分辨率的优点，使其非常适合于需要高成像速度的应用。
