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If so, how are they created (roughly speaking). Earlier in the video he says that a laser scanned the surface of the object, which suggests that no physical object needs to be present at the time of viewing the hologram, like what is required for a Mirage toy (seen here: http://www.youtube.com/watch?v=lFqlQiTTHRs). Is this right?
I am aware that this is a fictional show, so what they are saying should not be taken too seriously and the hologram effect could be added by CG effects, but I am interested in the actual workings of this type of hologram (as opposed to a "flat" hologram).