Qiaoen Luo, Ian Robinson, Fucai Zhang，“Optical Ptychographic Phase Tomography”，University College London,Final year project（2013）

【原文】

Optical Ptychographic Phase Tomography

ABSTRACT

The possibility of combining ptychographic iterative phase retrieval and computerised tomography using optical waves was investigated in this report. The theoretical background and historic developments of ptychographic phase retrieval was reviewed in the first part of the report. A simple review of the principles behind computerised tomography was given with 2D and 3D simulations in the following chapters. The sample used in the experiment is a glass tube with its outer wall glued with glass microspheres. The tube has a diameter of approximately 1 mm and the microspheres have a diameter of 30 µm. The experiment demonstrated the successful recovery of features of the sample with limited resolution. The results could be improved in future attempts. In addition, phase unwrapping techniques were compared and evaluated in the report.