Rigneault leads the MOSAIC team at Institut Fresnel, developing label-free nonlinear optical microscopy (CARS/SRS) for chemically-specific imaging of lipids and biomolecules in tissue, and pioneering lensless, hair-thin fiber-bundle endoscopes based on wavefront control for minimally invasive deep-tissue and in vivo biological imaging. He holds 17 patents in optical engineering and molecular spectroscopy for the life sciences.