Daniel Midtvedt in the Lab (IMAGE) Chalmers University of Technology Caption The photo shows the lab setup. A laser beam is divided into two light paths. One passes through a cell sample, the other does not. When the two beams are reconnected, it is possible to read changes in the cell's properties through variations in beam phase offsets. Credit Mia Halleröd Palmgren/Chalmers University of Technology 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.