A Projector the Size of a Quarter (image) North Carolina State University Caption Researchers used new polarization grating-polarization conversion system technology to create a small picoprojector, seen here, which could be embedded in a smartphone, tablet or other device. Credit ImagineOptix Corp. Usage Restrictions Photo credit must be given. 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.