The hologram is a two-dimensional surface that has the ability to display detailed images of real objects in three dimensions.
The word hologram is a neologism that is composed of the Greek holos, which indicates ‘everything’, and grammar, which refers to ‘message’.
Holograms have the property of containing the image of the object in its entirety despite being divided into smaller parts. It is a photographic technique that records the intersection of different angles of the reflections of the lights on an object to present a three-dimensional image.
The invention of the hologram is the work of the Hungarian physicist Denis Gabor (1900-1979) in 1948. Gabor receives the Nobel Prize in 1971 thanks to the invention of the laser beam in 1960, since the creation of the hologram is only possible with this technology.
Holograms are used today for display purposes, as measuring instruments or as safety devices, also called rainbow holograms.
For the creation of a homemade hologram for smartphones it is necessary to create a transparent glass or plastic pyramid with the cut cusp that will be placed on the phone screen. In this way, the holographic video will be reflected on the walls creating the three-dimensional image inside the pyramid.
The hologram is an optical illusion, since it shows something different from reality in terms of physics. The intersection of the lights that reflect the hologram is processed in the brain as a three-dimensional object due to the information the eyes receive.