Quote:
Originally Posted by calvin-c
As to how much science I know, I at least know enough to tell that something which has been demonstrated in the laboratory, regardless of the name that's applied to it, is not fantasy.
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If you are trying to say (as I have been thinking, correct me if I'm wrong) that "real" 3-D images have been projected
into clear air by lasers, making a visible image like in Star Wars, Star Trek, or similar, then you do not know what the hell you are talking about, plain and simple. You are making a fool of yourself. Yes, the holograms on credit cards are real holograms-- it is your silly science fiction fantasies that are not real holograms-- those are NOT REAL.
"3D holograms" are stored in crystals, and thus store data in 3 dimensions, not in 2 like a holographic film like that used on credit cards. "3D holograms" are NOT free-standing displays of laser light floating in the air-- and they never will be, as I have already explained that only very dangerous, high-energy lasers have visible beam paths in clear air. That is not an engineering issue, that is a fundamental physics issue. Your sci-fi fantasies will never come true. Yes, it is possible to make volumetric displays, but they will always be confined within something-- inside a glass cylinder or sphere, or inside a case with a projector and a spinning mirror, for example. But there will never be a device that you hold in your hand that projects visible, 3D laser holograms.