Does a communal "shutter based 3d" theater exist

[tripletopper]

I believe 3d effects are technically better on a shutter 3d vs a polar 3d.

In polar 3d I accidentally tilt my head, get double exposure, and get a "confused" 3d picture.

My mom does that and she gets 3d headaches.

Now that most companies are forgoing the 3D Blu Ray and 3d Streams, i would like to know if there are shutter 3d communal theaters around northeast Ohio.


If there is one, I'd like to go.

But more likely, I pointed out to the absirdity of handong out $50 powered glasses and communally sharing them in the post Covid-19 world.

I understand the economics of a communal shutter theater doesn't work. (Or if it does, it's unicorn rare and just set up as a tech experinent.)

Someone prove me worng and show me a shutter 3d, (or an alternate 3d that doesn't have the problems of polar 3d.). It's the difference between a good show and a headache for my mom.

[the13thman]

If you find yourself accidentally tilting your head when watching 3D, perhaps you should invest in a neck brace...

[Jlardonio]

Originally Posted by the13thman

If you find yourself accidentally tilting your head when watching 3D, perhaps you should invest in a neck brace...

The possible problem must have been watching in IMAX 3D with linear polarized and is thinking that all 3D polarized are the same. As with circular there isn't the same issue and is much better compared with linear, but linear makes each picture for each eye clear as the vertical and horizontal don't mix.

As I have circular polarized tech and I never got those issues and I can say that it can be as good as linear that I watch on IMAX 3D cinema rooms.

[tripletopper]

I know I don't get double exposures on a shutter based 3d, and most of my 3d problems come from double exposures. I dont understand how "circular polar" prevents accidental double exposures?

I can explain how shutter works. I can explain how perpendicular polarizing works. I know how perpendicular polarizing fails, by tilting heads.
I know how shutter 3d fails, by large, unequal ping times between tvs.

I can't tell you if I was in circular or perpendicular polarized theater, but i know whatever polar filter was in place was defeated and had double exposures. Tell me how to cause a circular polar double exposure, and I'll tell you if i was in a circular polar theater or not.

By the way, the lack of shutter based 3d communal theaters in the responses show me that I'm right. That the only reasons theaters don't use polar is because of obscene cost in a communal setting. But that shutter 3d is the technically superior tech, but doesn't scale down cost when group viewed. Exactly like Headphones are for sound.

[Jlardonio]

Originally Posted by tripletopper

I know I don't get double exposures on a shutter based 3d, and most of my 3d problems come from double exposures. I dont understand how "circular polar" prevents accidental double exposures?

I can explain how shutter works. I can explain how perpendicular polarizing works. I know how perpendicular polarizing fails, by tilting heads.
I know how shutter 3d fails, by large, unequal ping times between tvs.

I can't tell you if I was in circular or perpendicular polarized theater, but i know whatever polar filter was in place was defeated and had double exposures. Tell me how to cause a circular polar double exposure, and I'll tell you if i was in a circular polar theater or not.

By the way, the lack of shutter based 3d communal theaters in the responses show me that I'm right. That the only reasons theaters don't use polar is because of obscene cost in a communal setting. But that shutter 3d is the technically superior tech, but doesn't scale down cost when group viewed. Exactly like Headphones are for sound.

As with linear polarization the lenses must be aligned, one ( - ) and the other ( | ), if you tilt the head the lenses will be ( \ ) and ( / ) basically, which will be misaligned with the projection frequency.

With circular polarization that issue isn't as much stricted. One of the LG ads used to bring this as a feature: that people could watch 3D movies laying on the side. It was advertising exaggeration(as most advertises are) but circular polarization allows much more tilting than linear.

Over the internet and some videos I've watched some cinema rooms that had 3D active glasses and some others that had 3D headsets and all had cables to power them up which imo would make the 3D experience less confortable compared with passive tech.

There are also clip-on glasses(circular and linear versions) for those who wear prescription glasses so that the regular passive glasses won't become an inconvenience. With shutter glasses that basically won't be possible unless you get some contact lenses or really wide and heavy glasses for old 3D TVs. With new ones the active glasses are designed to be put over the prescription ones. The main problem with shutter glasses will always be power to make them play.

[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.

[tripletopper]

That's exactly what I think...

Shutter glasses are way to expensive for "communal theater" but have a technically superior offering if the number of people is limited to a family and s couple guests.

Exactly like how headphones are perfectly great for small numbers, and is cheaper than trying to make an asymmetrical room a good communal theater for a few people.

It's just as much about the biggest bang for the buck per person. For a typical communal theater, it's polar 3d and theaters engineered and constructed for surround sound. For one person, it's shutter glasses and headphones. At sone point, when you add enough people, ut crosses over

[BuggBellow]

Pre covid i know of a theater that had this system. Glasses were heavy but they worked really well. i felt it to be a superior system to the disposable glasses we are used to. it was a small 4 screen theater and covid ended their already delicate finances.

[Jay G.]

Originally Posted by tripletopper

TShutter glasses are way to expensive for "communal theater" but have a technically superior offering if the number of people is limited to a family and s couple guests.

Is this objectively true, or just a subjective opinion? Because I have an LG 4K OLED with passive 3D, and I'm more than happy with the image.

Plus, even with a few guests, it seems a lot easier. No worrying about whether I have enough glasses, whether they're all charged, etc. I also have a clip-on option for those that wear glasses, and even some "single eye" glasses, either only left or only right, if a person that doesn't want to watch in 3D still wants to watch along.

[Just_Discovered_3D]

Originally Posted by Jay G.

Is this objectively true, or just a subjective opinion? Because I have an LG 4K OLED with passive 3D, and I'm more than happy with the image.

Plus, even with a few guests, it seems a lot easier. No worrying about whether I have enough glasses, whether they're all charged, etc. I also have a clip-on option for those that wear glasses, and even some "single eye" glasses, either only left or only right, if a person that doesn't want to watch in 3D still wants to watch along.

I'm unsure, as I've seen it mentioned on here that the interlacing that 1080p 3D passive TVs were knocked for is still visible on 4K 3D passive TVs. Though active glasses can death, which sucks.

Sadly while I did find some clip-on active shutter glasses, but after purchasing them the seller offered a refund because they could not be sourced. I wonder if they ever existed. That said, even at RealD my pals prefer to wear both sets of glasses rather than use clipons.

On the plus side, 3D active glasses are now down to $10-20 a pair, which is what they should have been all along.

[Jay G.]

Originally Posted by Just_Discovered_3D

I'm unsure, as I've seen it mentioned on here that the interlacing that 1080p 3D passive TVs were knocked for is still visible on 4K 3D passive TVs.

I have a 55" 4K OLED 3D passive TV. I have to walk up very close to see that every other line is being skipped for each eye. Like, sticking my face about a foot away from the screen. From a normal viewing distance, it's not noticeable at all.