We propose a fundamentally new approach for ptychography probe position prediction for data with large position errors, where a neural network is used to make single-shot phase retrieval on individual diffraction patterns, yielding the object image at each scan point. The pairwise offsets among ...
在ptychography中,每个probe可以被考虑成“局部相位梯度的合并”(an amalgamation of localized phase gradients),和某个角度入射的平面波相似。 Analytic continuation:by analytic continuation,在一定区域内一个finite物体的空间频率能够被外推出这个范围。 Subpixel shifting 【这个算法是同时去计算probe信息和物体信息的】...
ψj(x)=O(x)P(x−Xj)ψj(x)=O(x)P(x−Xj) 照亮未知的物体O(x) with a known probe P(x) that is shifted to different positions Xj 同样可以用ER算法去迭代更新,因为重叠部分的存在能够更鲁棒。 Fourier ptychography 计算O(x)的傅里叶变换^O(x′)O^(x′)而不是它本身。 3D object 前面...
82217.1.2 Illumination/Probe-Object/Specimen 82217.1.3 Exit Wave or Transmission Function .. 82217.1.4 Object Functionsas Propagating Waves... 82217.1.5 Fourier/Detector Projection ... 82317.1.6 Bright and Dark-Field Data... 82317.1.7 The Fat-H and the Trotters... 82317.1.8 STEM/STXM... 8...
Here we report a ptychographic method that describes the object as the sum of discrete atomic-orbital-like functions (for example, Gaussian functions) and the probe in terms of aberration functions. Using this method, we realize an improved information limit of microscopic imaging, reaching down ...
Ptychography can be employed for the watermarking of a 3D object[47]. The multiple diffraction intensity patterns (equal to the number of scanned probe positions) of a 3D object are recorded as ciphertexts and are weight added to multiple host images. Each depth section of the 3D object can ...
In its basic scalar version, is based on the acquisition of series of diffraction intensity patterns recorded by illuminating an object at several overlapping positions with a finite-size spatially-coherent probe (see Supplementary Fig. 9a). If one can assume that the illumination P interacts with...
We analyze our approach with numerical experiments through different probe overlap percentages and varying noise levels. We also demonstrate improved reconstruction accuracy compared to the state-of-the-art method and discuss the advantages and disadvantages of our approach. ...
Ptychography ptychography is a computational imaging technique. A detector records an extensive data set consisting of many inference patterns obtained as an object is displaced to various positions relative to an illumination field. A computer...
X-ray ptychographic microscopy combines the advantages of raster scanning X-ray microscopy with the more recently developed techniques of coherent diffraction imaging. It is limited neither by the fabricational challenges associated with X-ray optics nor by the requirements of isolated specimen preparati...