Holographic Laser Show Images?

Being able to project a 3-D image hundreds of feet into open space is pure science fiction - there is no current technology and even basic theory that would make this possible without some medium to act as a screen. However, some pretty vivid illusions that may give the impression of such a display do exist and you may experience one at your next large scale laser show: (From: L. Michael Roberts (NewsMail@laserfx.com).) The most common way of creating this illusion is to use a scrim or a water screen. The scrim is a thin fabric screen, like mosquito netting, that is often dyed black or dark grey. It is rolled/lowered/flown into place while the audience is looking at something else, then used for laser graphics projections. Using typical modern 30K PCAOM projectors, flicker free images can be projected onto the scrim. While most of the laser beam goes through the scrim, enough of the laser is intercepted and reflected by the threads in the scrim to form an image. The water screen is a ...  more