Fresnel Lens (image) University of Chicago Caption Angela Olinto peers through a prototype Fresnel lens developed for the Extreme Universe Space Observatory. The observatory will incorporate three Fresnel lenses in a design that will allow the best efficiency for the widest field of view. Credit Courtesy of Angela Olinto Usage Restrictions News organizations may use this image in connection with reports about the JEM-EUSO experiment and Angela Olinto. 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.