Zone-plate (image) Harvard University Share Print E-Mail Caption This is a zoom-in showing a single molded zone plate. Credit The laboratory of Ken Crozier, Harvard School of Engineering and Applied Sciences. Usage Restrictions None Share Print E-Mail 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.