Transmission Structured Illumination Microscopy for Quantitative Phase and Scattering Imaging

• Main Authors: Kai Wen, Ying Ma, Min Liu, Jianlang Li, Zeev Zalevsky, Juanjuan Zheng
• Format: Article
• Language: English
• Published: Frontiers Media S.A. 2021-01-01
• Series: Frontiers in Physics
• Subjects: quantitative phase microscopy; structured illumination; phase gradient; resolution enhancement; multimodality imaging
• Online Access: https://www.frontiersin.org/articles/10.3389/fphy.2020.630350/full

In this paper, we demonstrate a digital micromirror device (DMD) based optical microscopic apparatus for quantitative differential phase contrast (qDIC) imaging, coherent structured illumination microscopy (SIM), and dual-modality (scattering/fluorescent) imaging. For both the qDIC imaging and the coherent SIM, two sets of fringe patterns with orthogonal orientations and five phase-shifts for each orientation, are generated by a DMD and projected on a sample. A CCD camera records the generated images in a defocusing manner for qDIC and an in-focus manner for coherent SIM. Both quantitative phase images and super-resolved scattering/fluorescence images can be reconstructed from the recorded intensity images. Moreover, fluorescent imaging modality is integrated, providing specific biochemical structures of the sample once using fluorescent labeling.