Nonlinear Optics and Light Diffusion Setup at EPFL (IMAGE) Ecole Polytechnique Fédérale de Lausanne Caption Nonlinear optics and light diffusion allow to see the unseeable. Credit © 2012 EPFL Usage Restrictions None License Licensed content Disclaimer: AAAS and EurekAlert! are not responsible for the accuracy of news releases posted to EurekAlert! by contributing institutions or for the use of any information through the EurekAlert system.