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A team of researchers from the University of Illinois has developed a spherical lens capable of allowing incoming light — from any direction — to be focused on the lens’s surface opposite the input direction into a very small spot. The lens is one of multiple microlens designs the researchers introduced, each of which are 3D printed and feature adjustable refractive indices. Standard lenses have a single refractive index and, as a result, only a single access point for incoming light to travel through the lens. With the ability to precisely control both the shape of the lens in the fabrication process, and the properties of the internal refractive index, the researchers introduced two distinct ways to manipulate (bend)…READ MORE