Lens/Camera (image) The Optical Society Caption (a) This is the new Fresnel lens, 1 mm thick and less than 4 mm in useful diameter, with a Euro cent for comparison. (b) This is the new thermal infrared camera, which integrates the lens. Credit Optics Letters Usage Restrictions Include caption & credit 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.