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 ...

/Physical sciences/Physics/Condensed matter physics/Solid state physics/Crystallography/ Crystal structure Additional Multimedia Schematic diagram of bifocal lens ...

Future VR headsets could use a new type of lens inspired by holographic devices. The bilayer bifocal lens relies on external voltage to change the intensities in the foci.