We present a simple low-cost microscope that uses a vectorial extension of Fourier ptychography to recover the absorption, phase and polarization properties of a sample at high-NA across a wide field-of-view. Our principle is validated by experimentally imaging quantitative test targets as well as a plant root and rabbit spinal cord cross-sections, with which we demonstrate the ability to record complex specimen birefringence over 10.4 mm2 field-of-view at 0.73um resolution. Our new Fourier ptychographic approach also enables the measurement and correction of polarization-dependent pupil aberrations. We hope this simplicity helps adapt joint polarization and phase imaging to a wider array of applications.
We propose a new sensitive diffuse correlation spectroscopy(DCS) method that can probe and identify different decorrelation events happens in sub-second, by acquiring parallelized measurements from 12 fiber detectors placed at different positions on the tissue-phantom surface with a 32 ×32 SPAD array, and process the data with deep learning methods. Both experimental and simulation phantom studies are conducted to evaluate the performance of our system in classifying and imaging decorrelation patterns presented under a 5mm thick tissue phantom made with rapidly decorrelating scattering media.