Continuous-wave terahertz reflective ptychography by oblique illumination

作者：Lü Rong, Chao Tang, Yuchen Zhao, Fangrui Tan, Yunxin Wang, Jie Zhao, Dayong Wang, Marc Georges · 发表于：Optics Letters · 年份：2020 · DOI：10.1364/ol.400506 · 被引用次数：23 · 研究领域：Advanced X-ray Imaging Techniques、Terahertz technology and applications、Crystallography and Radiation Phenomena

Massive usage scenarios prompt the prosperity of terahertz (THz) reflective imaging methods. In this Letter, we apply ptychography to continuous-wave THz reflective imaging. Our scheme has a compact lensless layout and uses a full-field oblique-illumination recording mode. Diffraction patterns are corrected through tilted plane correction. This method can be used to retrieve the complex-valued object function and to suppress the negative effect of non-uniform illumination. The feasibility is investigated using two metal samples.