Three-dimensional (3D) displays have attracted great attention over the past five decades. 3D virtual objects were originally displayed with a head-mounted display in 1968. Since then, continuous efforts have been made to explore 3D displays that have planar surfaces, and several methods have been developed to provide stereopsis for binocular vision.
A different approach to realize advanced 3D displays is using a physical 3D space to render graphics instead of a planar surface and forming a visual representation of an object in three physical dimensions, as opposed to the planar image of traditional screens that simulate depth through various visual effects.
Holography is a photographic technique used to capture three dimensional images using the properties of the coherent light emitted by lasers. The word holography comes from the Greek holos, or “whole” and graphein, or “write”. Thus holography means “to represent a whole”. To produce a hologram, you must light an object with coherent light (laser light) and save the interference pattern created on a holographic plate.
Pattern is created by the intersection of the laser beam and the reflection of the light laser induced plasma. It sounds super-technical… & fascinating… because it is on both accounts.
The volumetric holograms being produced in labs now are a far cry from what’s coming. Nevertheless, they are very exciting.