Holographic Projection (Peppers Ghost)
Contrary to popular belief, Holographic Projection is nothing new, in fact it has been around since the mid-nineteenth century when it was used by John Henry Pepper and the name “Pepper’s Ghost” was coined.
The technique produces the effect of and object appearing or disappearing and objects being transparent. It is created simply by using a sheet of glass, prospect or tensioned clear plastic. This is positioned at 45° to the audience and a hidden scene is revealed.
The technique can also be used with projected content or video screens to make it appear that the image is floating in mid-air and/or translucent.
Recently it has become more common after it’s use on stage to bring back dead stars such as Tupac at the Coachella Festival in 2011.