About holography
How they do it
How it works

How it works

     The interference pattern that is recorded on the hologram can be considered as being a very thin layer
     containing millions of tiny mirrors.

     When light shines from one direction onto the hologram, all
     these mirrors reflect the light, each in its own direction.
     Looking at the hologram from a certain angle, you see
     thousands of tiny reflections. Combined, these reflections
     create an image.

     Like a picture in a newspaper is made out of dots of ink, a
     hologram is built out of little dots of light.

     If you now look at the hologram from a different angle, the
     dots of light you were looking at will disappear. Instead,
     other mirrors are now lighting up. Together they form an
     image that shows the object from a different angle.

     So when you look at a hologram, your eyes are always
     seeing two different images. Because each eye is seeing the object from the right perspective, your brain
     is tricked - it makes you see a three-dimensional object, instead of two slightly different flat images.

     To complete the illusion, you can also look at the object from different directions - the hologram always
     shows the object from the right angle.