The development of high throughput three-dimensional (3D) microscopic imaging technique is important for studying cell physiology and early-stage disease diagnoses. Here we propose and demonstrate a digital micromirror device (DMD) based angle-multiplexed high-speed optical diffraction tomography (ODT) technique. Using this ODT technique, we have achieved 3D imaging of cells at over 600 tomogram/second speed, which is 10-100 times faster than current ODTbased 3D cell imaging techniques. We envision that this high-speed ODT system will enable many cutting-edge biomedical applications, such as capturing millisecond scale cell dynamics in 3D space and high throughput 3D imaging of large cell populations.
We propose and demonstrate a high sensitivity common-path quantitative phase microscopy (QPM) technique that can be used to detect nanoscale dynamics with millisecond temporal resolution. Our system is based on a transmission-mode diffraction phase microscope that is implemented with a high electron well-depth camera to reduce the phase noise. Our current system can achieve ~0.1 mrad temporal phase sensitivity, which is one order of magnitude better over most current QPM systems. Our system can be potentially used for observing morphological changes of cells and probing subnanometer membrane dynamics with millisecond temporal resolution.