What is a Hologram?

Holography was discovered by American scientist M.J. Buerger when taking X-rays to take pictures of the atomic structure of crystals. He and Gabor created the theory of holography, which uses the principle of two-beam interference to The object pattern and another object-coherent beam (reference beam) produce an interference pattern to "combine" the phases, so that the phase and amplitude can be recorded simultaneously with a photosensitive film, and a holographic image can be obtained. However, due to special requirements when shooting and reproducing, holographic technology has been confined to the laboratory almost from the day it was born.