Future virtual reality (VR) headsets could use a new type of lens inspired by holographic devices, researchers in China say. This proposed new type of bifocal lens can switch between one focus and another at the flick of a switch, letting wearers witness intensities in the lenses change akin to a hologram.
These lenses would be made from two layers of liquid crystal structures that can switch between two foci with external voltage. The researchers described their findings in a new study published Oct. 1 in the journal Optics Letters.
