Hologram (reflection)

Holography is the science and practice of making holograms, which are normally encodings of light fields rather than of images formed by a lens. Holograms are usually intended for displaying three-dimensional images. The holographic recording itself is not an image; it consists of an apparently random structure of varying intensity, density or surface profile. When it is suitably lit, the original light field is recreated and the view of the objects that used to be in it changes as the position and orientation of the viewer changes, as if the objects were still there.

(Source: Wikipedia)