Originally posted by sir_chancealot
Oh, there isn't? Dang, I guess these guys are going to have to go out of business then....
www.io2technology.com...
And here is a link showing it in action....
www.youtube.com...
You know what's funny? I knew, people would come up with the same videos of "holograms", trying to proove me wrong, as on that other thread...
I really don't see why people should go out of business, for creating a screen out of mist, for projecting images on.
But this is not a hologram, and it is not three dimensional and it's not really mid air.
The HelioDisplay is a normal 2D projection onto a screen of fine mist. This mist is expelled from that big device below it, and acts as a screen for
the projection. Sensors measure the position of the users fingers and report it back to the computer, to allow for an interface.
I already explained this in my first post.
All that these companies only offer are normal 2D projections, either on a tilted transparent foil (Pepper's Ghost),
or a fine mist. Go check,
and you'll see i already mentioned it.
They do like to use the word 3D a lot, but it's just for commercial. They always have a disclaimer, saying something like "the illusion of 3D is
created in the mind of the audience". The reason it seems real is because the further away you sit when you watch this, the less obvious it becomes,
it's just 2D.
I agree, it's very cool, tho.. I wouldn't mind having one, once it's made smaller and ready for widespread commercial use.
One of the most interesting projection systems so far is a reverse pyramid - Cheoptics, from Musion Eyeliner, which is again only Pepper's Ghost, but
from four sides. The transitions between the edges are covered up by the thick support beams. The object appears to float in the middle.
These tricks can be used to make an object appear to float in mid air, or a person stand on the stage, together with a real person, but it's always
just reflections on that tilted foil or glass plate.
The only way to see real 3D images is Stereoscopy. I worked with it a lot, and it can make objects appear to float in front of the monitor, or even be
deep behind the surface of the screen.
There are also some 3D projection systems in developement, that work without stereoscopy, but they need a fast spinning mirror, or a helix.
There is no way of projecting real volumetric 3D images in mid air yet.
Altho on the other thread i mentioned, i described a technology, that could for the first time ever present this possibility, by creating tiny (and
very loud) glowing balls of plasma in mid air.
Unfortunatelly for now, a real 3D volumetric projection system doesn't exist.
And if it is ever developed, it will not be called a hologram. The word "hologram" already means something else.
BTW: Unlike some people, i don't talk about things i know nothing about. I researched this a whole lot, and worked with stereoscopy as a hobby
myself. I also work with lasers proffesionally, so i know what holograms are and what they are not.
On the last few pages of that other thread, you can check out the explanations why a mid air 3D projection system using lasers is impossible (except
for those loud balls of plasma), together with some nice pics of laser beams, prooving this.
You always need something to project the image on. And even then it only works well in darkness and is only two dimensional.
[edit on 7/2/08 by deezee]
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