Which method of 3D projection is used in the Ice Age 3D movie?
Question by poonky: Which method of 3D projection is used in the Ice Age 3D movie?
For the Ice Age 3D movie shown in cinemas, I noticed that the glasses we were given didn’t have 2 lenses of different colors. So obviously a different method of projecting a fresher 3D image was used. The glasses just looked like a normal pair of sunshades (darkened lenses with no noticeable coloring). Does anyone know which 3D technique uses this type of glasses?
Are there movies I can buy which make use of this cinema 3D technique? (I’m aware of the anaglyph 3D movies currently available for home viewing, but I’m wondering if there are movies shot with the other technique available).
Thanks for the quick reply. I find the 3D image quality to be much better when using this “polarization” system. Are there movies commercially sold for home viewing that makes use this projection system?
Best answer:
Answer by Jeroonk
It works similar to the red-blue colored film: one glass cancels out one color, the other glass does the opposite. That is how you get to pictures, and thus a 3D effect.
But in this case, they use 2 projectors, one with horizontal polarized light, and one with vertical polarized light.
(Polarized light is that the lightwaves “vibrate” along one axis, in this case horizontal and vertical, http://www.ccrs.nrcan.gc.ca/glossary/images/3104.gif )
Your glasses now work as polarized shading glasses, but one one blocking out the horizontal polarization, the other the vertical.
* EDIT: Answer to additional question *
I don’t know about stereo movies being commercially available for “regular” customers. You can download some, and there are short-movies made with this technique…
But the main problem is the equipment you need to have to able to view it.
If you want to display as in 3D cinemas, you’ll need a stereo-projector with polarization filters angled 90 degrees.
Those things are very expensive (talking in the 10000$ range or more)
However, LCD screens already have linear polarization due to the way they make the colors. So combining two of them (angled 90 degrees) with a half transparent mirror, you can produce the same effect for a much lower budget ($ 300).
http://howto.wired.com/wiki/Build_a_3-D_Theater
But in the end: you are better off watching an anaglyph colored movie then acquiring a polarized movie system. The costs just outweigh the availability of stereo movies being sold.
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