Future VR headsets could use a new type of lens inspired by holographic devices. The bilayer bifocal lens relies on external ...

Left and right Diagram showing how left circularly polarized (LCP) light is converted by the bifocal lens into separated beams of LCP light and right circularly polarized (RCP) light. (Courtesy: Fan ...

The bifocal lenses are made from bilayer structures of liquid crystal (LC) cells and LC polymer. These lenses split light with a left-handed circular polarization (LCP) into two focused light ...

From the hand-held magnifying lenses used by Italian artists and scholars in the 13th Century, to the invention of bifocal lenses by American statesman and inventor Benjamin Franklin in 1784 ...