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Microscopic 3D measurement of shiny surfaces based on a multi-frequency phase-shifting scheme
Yan Hu, Qian Chen, Yichao Liang +3
Microscopic fringe projection profilometry is a powerful 3D measurement technique with a theoretical measurement accuracy better than one micron provided that the measured targets…
Optimal illumination pattern for transport-of-intensity quantitative phase microscopy
Jiaji Li, Qian Chen, Jiasong Sun +3
The transport-of-intensity equation (TIE) is a well-established non-interferometric phase retrieval approach, which enables quantitative phase imaging (QPI) of transparent sample s…
Fringe pattern analysis using deep learning
Shijie Feng, Qian Chen, Guohua Gu +5
In many optical metrology techniques, fringe pattern analysis is the central algorithm for recovering the underlying phase distribution from the recorded fringe patterns. Despite e…
Three-dimensional optical diffraction tomographic microscopy with optimal frequency combination with partially coherent illuminations
Jiaji Li, Qian Chen Jiasong Sun, Jialin Zhang +2
We demonstrate a three-dimensional (3D) optical diffraction tomographic technique with optimal frequency combination (OFC-ODT) for the 3D quantitative phase imaging of unlabeled sp…