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Simulation and experimental validation of microscopic phase image formation with spatially incoherent illumination using a quadri-wave lateral shearing interferometer

Phase imaging is a very useful tool to image biological semi-transparent microscopic samples. Indeed, the intrinsic optical contrast of such a sample is very low, implying that phase recording is required to extract useful information. Most of usual microscopy techniques to measure the complex electromagnetic (EM) field,are related to holographic microscopy and therefore involve a dedicated microscope and a temporally and spatially coherent source.