Plastic sample (IMAGE) Optica Caption Researchers showed that their new hyperspectral Raman imaging lidar system can detect and identify various types of plastics from 6 meters away. The plastic sample they tested (pictured) has a polyethylene sheet in the upper position and a polypropylene sheet in the lower position. Credit Toshihiro Somekawa, Institute for Laser Technology Usage Restrictions None License Original 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.