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Date published: 2019-08-22
Originally published: Here. Transcribed below.

All of this is thanks to an earlier technology a team of some of the same researchers developed. The flat lens design this new artificial eye takes advantage of is called a metalens. It uses tiny nanostructures to focus light. In this way, it's able to focus the entire visible light spectrum at a single point. By contrast, traditional lenses use multiple elements to achieve the same feat, which is why they get so bulky.
Prior to this latest breakthrough, the SEAS team says they were only able to manufacture metalenses that were "the size of a piece of glitter." By contrast, their latest invention is larger at approximately one centimeter in diameter Bigger, in this case, is better because it makes it more feasible to use the technology in a host of modern applications. With cameras, for instance, a lens needs to be big enough to cover a sensor so that there's no vignetting.
As with any new technology, it'll likely be years before metalenses make their way to consumer gadgets. However, their potential is unmistakable. Combined with even smaller computer chips, something like virtual and augmented reality headsets could become small and comfortable enough where the technology becomes appealing to the average consumer.

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