Hologram
From ImperialWiki
A hologram is a three-dimensional image projected onto a two-dimensional surface by carefully controlling the diffraction or reflection of light to produce an illusion of depth.
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[edit] Holograms in Science Fiction
In science fiction stories, holograms can typically be projected into empty air instead of onto a flat surface.
[edit] Holograms in Star Trek
In Star Trek, holograms are used primarily in entertainment systems known as holodecks. In these systems, light is controlled to produce three-dimensional images on walls and in free space within the holodeck chamber. Force fields and replicator technology are used to give solidity to the images.
[edit] Holograms in Star Wars
In Star Wars, holograms are primarily used in communication systems to allow "face to face" conversations over interstellar distances. They are also used in military command-and-control centers to provide leaders with three-dimensional views of a combat zone.
