Metalenses have been a thing for a while now. We first wrote about them here on DIYP back in 2016 when a team at Harvard first built a lens that’s even thinner than the waves of light being focused. The goal of such lenses is to essentially shrink cameras down as much as possible. They use nanostructures to focus the light instead of the optics we’re used to in more traditional lenses, but they have something of a flaw.
It’s kind of a fatal flaw, too, and that’s image quality. The images aren’t really sharp, nor are they high resolution – especially when it comes to wide angles. They’re “ok” with a little help from AI, but they’re not great. Now, though, a team of researchers at Nanjing University in China believe they’ve solved the issue, by not just using a single metalens, but a whole array of them, with each tuned to a range of different angles.