Window Coating Comparison (IMAGE) University of Pittsburgh Caption The fabricated smart windows are shown in both states, showing that the transmitted visible light changes very little. Credit Youngblood Photonics Lab Usage Restrictions N/A 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.