3d at home

**osiris777** · 21-12-09, 05:34 PM

went and seen Avatar, amazing amazing film in so many ways and that lead me onto thinking that it could the movie to make me buy a blu ray player.
a few questions i am wondering about now is, so the cinemas use whats called real d 3d which dosnt seem to be available in the home yet, so what do the 3d movies for home use? the old red/cyan coloured glasses?
how does that compare to real d 3d?

**mandc** · 21-12-09, 05:53 PM

Originally Posted by osiris777

went and seen Avatar, amazing amazing film in so many ways and that lead me onto thinking that it could the movie to make me buy a blu ray player.
a few questions i am wondering about now is, so the cinemas use whats called real d 3d which dosnt seem to be available in the home yet, so what do the 3d movies for home use? the old red/cyan coloured glasses?
how does that compare to real d 3d?

Yep the old red/cyan glasses that are utter crap.
The movies use very fast alternating polarised frames and you have circular polarized glasses on that allow each eye to only see the correct image...something I can't see TV's being capable of in the near future.

"RealD 3D cinema technology uses circularly polarized light to produce stereoscopic images. Circular polarization is preferable to linear polarization because viewers are able to tilt their head and look about the theater naturally with no loss of 3D perception. Linear polarization, on the other hand, requires viewers to keep their head within a certain degree of tilt for effective 3D perception, otherwise they can see double or darkened images.[6]

The projector alternately projects the right-eye frame and left-eye frame 144 times per second, and circularly polarizes these frames, clockwise for the right eye and counterclockwise for the left eye. A push-pull electro-optical modulator called a ZScreen is placed immediately in front of the projector lens to switch polarization. The audience wears recyclable circularly polarized glasses to make sure each eye sees only "its own" picture, even if the head is tilted. In RealD Cinema, each frame is projected three times to reduce flicker, a system called triple flash. The source video is usually only (2x)24 frames per second (which can result in a subtle ghosting and stuttering on horizontal camera movements). A silver screen is used to keep the light polarized and to reflect back as much light as possible to counter polarization losses. The result is a 3D picture that seems to extend behind and in front of the screen itself.[7]"

**mate** · 21-12-09, 06:14 PM

3D development has to improve in the future. Sound has made fantastic leaps & bounds with surround sound and digital reproduction. Video has to make the next step or the consumer will lose interest.

**bigfella08** · 27-12-09, 09:19 AM

So your telling me those 3D glasses from(that accidently fell into me pocket

)the cinema wont do squat at home????????????

**mandc** · 27-12-09, 09:31 AM

Originally Posted by bigfella08

So your telling me those 3D glasses from(that accidently fell into me pocket

)the cinema wont do squat at home????????????

Pretty much

**osiris777** · 27-12-09, 10:21 AM

exactly.
and i dont think they were expecting you to give them back, i have 2 pairs here.

**iwacelect** · 27-12-09, 11:20 AM

the simplest way to do it at home would be the same way they do it at the cinema, projecting the image through a polarising plate that switches the light info to have the different polarisation to create the false image of depth

theres no reason that couldnt be done at home, if there was enough interest then it'd only be a matter of time before the system cost drops into the realm of home user!

just gotta hold your breath for long enough.

**osiris777** · 27-12-09, 11:28 AM

Real D, the company that do the cinemas are attempting to do it at home. think its the first thing you see on their website.

**mandc** · 27-12-09, 11:39 AM

It will be real interesting to see how they do it. If it is for televised 3d, they would have to increase the transmitted framerate which would not be possible with pal.
Again with discs, you would need a different format to get the higher framerate. Maybe they will add a data code to simulate the different images...like surround sound.
A polarizing screen over the entire tv screen would be another problem