holography which talked about in last article 'future communication ' it is a techonolgy to make image in three dimensions by using laser

How it works

Recording a hologram   Reconstructing a hologram
from this 2 images we can realize the idea of holographic it so simple it's divided to 2 parts 1st recording hologram 2nd reconstructing a hologram in recording hologram the laser beam divided to 2 two parts when passes on splitter1st part goes to pattern and reflected to the holographic plate 2nd part goes to mirror and reflected to holographic plate and making interference between the beams which makes transparent and dark areas on holographic plate  in 2nd reconstructing a hologram get data from holographic plate by showing the holographic plate to laser beam.