Researchers at the Engineering School of Sao Paulo University in Brazil have developed a lens that is only one thousandth the thickness of a human hair, and can be used in smart phones or other devices that require imaging sensors. Emiliano Rezende Martins, a professor in the Department of electronic engineering and computing at the University of Sao Paulo and corresponding author of related papers, said, “in the current technological environment, its scope of application is almost unlimited.” This kind of lens is called super lens. Super lens technology came out 10 years ago, using a layer of ultra-thin micro guided wave tubes called hypersurfaces to maximize resolution (from a physical point of view).
inspired by the traditional lens with higher reflectivity, the larger the field of view, the super lens designed by researchers can imitate the plane lens with infinite reflectivity.
Martins said, “our lens angle of view can reach 180 ° and the image will not be distorted. We tested its efficiency at 110 ° angle. When the viewing angle is larger, the light energy will be attenuated due to shadow effect, but this problem can be corrected in the post-processing the combination of hyperlenses is not conducive to the improvement of resolution, but this lens from the University of Sao Paulo can meet the requirements of all traditional applications. Martins used a 3D printing camera to test the lens and obtain high-resolution photos with large field of view. “So far, we’ve only been successful with green imaging, but in the next few months we’re going to further upgrade the lens so that it can image all colors,” he said