According to media reports, researchers from NVIDIA and Stanford University are developing ultra-thin VR holographic glasses. The team built a prototype of an ultra-thin VR display with a thickness of only 2.5mm. The holographic glasses called holographic glasses are composed of a pupil replication waveguide, a spatial light modulator and a geometric phase lens, and use a 2.5mm thick optical stack to transmit full-color 3D holographic images.