How does Holographic Projection Work?
The basic concept that revolves around the projection of holograms is the splitting of a laser beam. In contrast to the ordinary light that sources from a torch, laser beams are purer. The light waves in a laser beam are coherent, and they travel very precisely.
As you split this laser beam, these light waves travel in two parts but identical ways. Once they recombine on the photographic plate's surface, the light rays in the object beam reflect off the object's outer surface, travel in a different path, and become disturbed.
By bringing together the two separated beams of the laser light, you will notice the image changing as the object changes the light rays that fall onto it. This "data" becomes a permanent memory on the photographic plate so you can see what the item looks like from every angle.
The best part is that all points of a hologram catch light waves travelling from all objects. Thus, when you move around the holographic image, it seems to change just like the real object or product changes, creating what you call a 3D image.