Does a communal "shutter based 3d" theater exist

[tripletopper]

So when you say circular, do you mean angular like slices of pizza, or circumfrencial, like rings on a bullseye?

Also I heard there was motion involved in circular 3d. If it moves, is that a polar shutter that universally syncs on and off alternate frames within a communal setting? If so, then circular oolar is kind of a hybrid between perpendicular filters, and timing based filters.

[Jlardonio]

Originally Posted by tripletopper

So when you say circular, do you mean angular like slices of pizza, or circumfrencial, like rings on a bullseye?

Also I heard there was motion involved in circular 3d. If it moves, is that a polar shutter that universally syncs on and off alternate frames within a communal setting? If so, then circular oolar is kind of a hybrid between perpendicular filters, and timing based filters.

Something like this:

https://www.miniphysics.com/wp-conte....255Colors.gif

Reald 3D uses circular polarized, while IMAX 3D uses linear one.

There are threads in the 3D forum relative about circular and linear polarization as I don't know much how to explain about it technically.

EDIT: Drag the link to a new tab because the forum isn't allowing to open it normally.

[Jay G.]

I recall one of my first 3D movie theater experiences being IMAX where they used active shutter glasses, and even included speakers in the glasses for "close-up" audio that sounded like someone whispering in your ear. I think it was for some dinosaur-themed movie, probably a 30-40 minute affair. I think they were wireless.

I think most movie theaters, even IMAX, have moved away from active shutter glasses. They're expensive, could get broken, need to be charged between showings, need additional equipment in the theater to allow for syncing, etc.

Meanwhile, passive 3D tech like RealD use cheap plaster glasses that are basically disposable. Sure, they put a collection bin for you to return them, but if you don't return them, or they break or whatever, it's no big deal, the theater is probably out $2-3 bucks per pair, instead of $50-$100 for an active shutter pair.


XpanD 3D was the most prominent active shutter brand, and according to Wikipedia, at one point was deployed to "over 15,000 cinemas worldwide."
https://en.wikipedia.org/wiki/XpanD_3D
https://www.av-iq.com/avcat/ctl1642/...-cinema-system

https://3dvision-blog.com/8993-activ...ovie-theaters/
The company seems to be gone now, or they transitioned to 3D printing, as that's what that brand is used for now:
https://xpand-3d.com/

This site still lists gear for a theatrical active-shutter setup, although it's anyone's guess if you can still buy it:
https://www.3dcinemasolutions.com/ci...3d-system.html

You can maybe look up theaters to see what type of 3D they're showing. If you see RealD 3D, Dolby 3D and IMAX 3D though, those are all passive 3D tech now.