Friday, January 19, 2007
Olympic Games Opening 2004 - 3D DNA Helix
At the Opening Ceremony of the Olympic Games in Athens, they (seemingly) projected a DNA Helix in the middle of the stadium.
Cybrbeast didn't believe it so here is the video. Please give an explanation.
You might not be able to see the scale of the helix in this crappy youtube video, but I estimate it is at least 20m high. Here is a pic where you can see the scale of the helix.
Skip the video to 3min:
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5 comments:
This is not true 3D projection. I think this is a clever projection into a vapor cloud.
AFAIK, this is the only technique that can project a real 3d image into air and not into some medium.
Yeah, it's not a point of light created in the air. I do think that it is 3D though because there are people on all sides in that stadium. It would be pretty gay if only the two long sides could see it.
There are images of the projection from different sides and angles and they show the same helix.
I think it is created by projecting beams of light through a cylinder shaped 3D waterscreen. They have to move the light beams around the waterscreen and I have no idea how they did that. This way they can't create many different 3D images, but it is 3D and can be viewed from all sides.
That japanese trick is impressive btw!
By not a true 3D projection I meant that it wasn't in thin air. But I see how that could be misunderstood.
the water/mist screen is actually mostly planar (2d), it seems [photo]. the projection is a *perspective* projection of DNA using 4 lasers (i don't know where they're all positioned, but I think they were all on one side based on that photo). This gives the *illusion* of 3d. [video] If you skip to 3:57 in the video, you see a side view that looks rather different from the face-on view shown to TV audiences (right side). The effect is *absolutely brilliant*. I used to think they had to move lights around, but this solution makes the most sense given the images and videos available, and also because it's the simplest explanation. i hope it helps!
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