Virtually Lossless Geometric Phase Flat Lens Fabricated with Nanopore Modification in Silica Glass (image) Changchun Institute of Optics, Fine Mechanics and Physics, Chinese Academy of Sciences Share Print E-Mail Caption (Left) Birefringence image of a flat lens and intensity patterns of 488 nm laser beams with different handeness circular polarizations focused and defocused by the same lens. The focal lengths are ± 208 mm. (Right) The same lens corrects short -5 D and long +5 D sightedness. Credit by Masaaki Sakakura, Yuhao Lei, Lei Wang, Yan-Hao Yu, and Peter G. Kazansky 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.