Post Syndicated from Charles Q. Choi original https://spectrum.ieee.org/tech-talk/consumer-electronics/portable-devices/holovideo-phones
A thin holographic display could one day enable 4K 3-D videos on mobile devices as well as household and office electronics, Samsung researchers and their colleagues say.
Conventional holograms are photographs that, when illuminated, essentially act like 2D windows looking onto 3D scenes. The pixels of each hologram scatter light waves falling onto them, making the light waves interact with each other in ways that generate an image with the illusion of depth.
Holography creates static holograms by using laser beams to encode an image onto a recording medium such as a film or plate. By sending the coherent light from lasers through a device known as a spatial light modulator—which can actively manipulate features of light waves such as their amplitude or phase—scientists can instead produce holographic videos.