Thibault Pierre, Dierolf Martin, Bunk Oliver, Menzel Andreas, Pfeiffer Franz
Paul Scherrer Institut, 5232 Villigen PSI, Switzerland.
Ultramicroscopy. 2009 Mar;109(4):338-43. doi: 10.1016/j.ultramic.2008.12.011. Epub 2009 Jan 4.
Ptychography is a coherent diffractive imaging method that uses multiple diffraction patterns obtained through the scan of a localized illumination on the specimen. Until recently, reconstruction algorithms for ptychographic datasets needed the a priori knowledge of the incident illumination. A new reconstruction procedure that retrieves both the specimen's image and the illumination profile was recently demonstrated with hard X-ray data. We present here the algorithm in greater details and illustrate its practical applicability with a visible light dataset. Improvements in the quality of the reconstruction are shown and compared to previous reconstruction techniques. Implications for future applications with other types of radiation are discussed.
叠层成像术是一种相干衍射成像方法，它利用通过对样品上的局部照明进行扫描而获得的多个衍射图案。直到最近，用于叠层成像数据集的重建算法还需要入射照明的先验知识。最近通过硬X射线数据展示了一种新的重建程序，该程序可以同时检索样品图像和照明轮廓。我们在此更详细地介绍该算法，并用可见光数据集说明其实际适用性。展示了重建质量的改进，并与以前的重建技术进行了比较。还讨论了对未来其他类型辐射应用的影响。
