Real life holograms could serve as doors to endless possibilities. 🤔 engineering
Holograms are virtual, three-dimensional images produced by the interference of light beams that reflect real physical objects. In simple words, holograms are 3D images formed when two light beams interfere and produce an image on a film or other surfaces. While there are many types of holograms and varying ways to classify them, most holograms are variations or hybrids of either reflection holograms or transmission holograms.
The eagle on a VISA card, which uses a layer of aluminum on the back for the mirror effect, is also an example of transmission holograms. Other than reflection and transmission holograms, there are numerous other sub-types that behave as hybrid versions of the above two, and all these holograms are called hybrid holograms.
A light-sensitive compound on the film, silver halide reacts with the light and records its amplitude or intensity.In the case of a hologram, the working principle is nearly the same but the setup is different. Here, you have a laser beam pointed towards a plate thatinto two beams, the reference beam, and the illumination beam. Again, a shutter opens or moves out of the path of the laser.