We present an alternative numerical reconstruction algorithm for direct tomographic reconstruction of a sample's refractive indices from the measured intensities of its far-field coherent diffraction patterns. We formulate the well-known phase-retrieval problem in ptychography in a tomographic framework which allows for simultaneous reconstruction of the illumination function and the sample's refractive indices in three dimensions. Our iterative reconstruction algorithm is based on the Levenberg-Marquardt algorithm and we demonstrate the performance of our proposed method with simulated and real datasets.
|Journal||Physical Review A (Atomic, Molecular and Optical Physics)|
|Number of pages||9|
|Publication status||Published - 2019|
Ayres Pereira da Cunha Ramos, T. J., Grønager, B. E., Andersen, M. S., & Andreasen, J. W. (2019). Direct three-dimensional tomographic reconstruction and phase retrieval of far-field coherent diffraction patterns. Physical Review A (Atomic, Molecular and Optical Physics), 99(2), . https://doi.org/10.1103/PhysRevA.99.023801