Discussion - Screens for 3D Projection - Page 12 - AVS Forum | Home Theater Discussions And Reviews
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post #331 of 336 Old 07-27-2016, 01:28 PM
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Originally Posted by wnielsenbb View Post
Actually the JVC's use active 3D. The downside is the horizontal polarization conflicts with current 3D active glasses. You want a screen that retains NO polarization. If it retains polarization the image will be dimmer, due to how the glasses work. Any decent white screen should work fine.

Warren.
That is not the case.. with JVC glasses and JVC projector at least.

JVC's glasses are horizontally polarized, so in order to get the brightest 3D image from the new JVC projectors, one needs a screen that DOES RETAIN polarization and use JVC glasses.

If you are using cheaper 3rd party glasses, which nearly all are vertically polarized, then yes.. you would need a screen that DOES NOT retain polarization.
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post #332 of 336 Old 07-27-2016, 02:52 PM
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I should have imagined that was true. I was thinking he thought it was a passive 3D system.

Found a good chart for Da-Lite screens.
http://www.projectorreviews.com/home...ection-part-2/

http://www.bhphotovideo.com/bnh/cont...C&A=details&Q=

1222 is a bit out of the price hoped for, but a good screen is worth it. It will outlive many projectors.

Warren.
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post #333 of 336 Old 04-28-2017, 11:07 AM
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Quote:
Originally Posted by alpin3r View Post
That is not the case.. with JVC glasses and JVC projector at least.

JVC's glasses are horizontally polarized, so in order to get the brightest 3D image from the new JVC projectors, one needs a screen that DOES RETAIN polarization and use JVC glasses.

If you are using cheaper 3rd party glasses, which nearly all are vertically polarized, then yes.. you would need a screen that DOES NOT retain polarization.
I know this thread is a little old, so I apologize for bringing it back to life again :-)

I just bought a JVC RS420 projector, and I have an Elite CineTension 2 screen. I'm looking to buy 3D glasses for it, and want to confirm what I understood by reading the first several posts, and the post I'm replying to.

In the first post, it said something about the Elite screen had a 1 on the polarization retention, which was around 15-25%.

Based on the post above, it appears that it would be best for me to use vertically polarized glasses. Is that correct?

PN59D8000 and JVC RS420 with Elite 120" screen
Receiver - Yamaha RX-A3060, WXA-50 MusicCast Amp for Zone 2
Front - CM9, Center - CMC2, Side Surrounds - DS3, Rear Surrounds - CM5, Front/Rear Atmos - CCM663, Subs - PB12+ and PB13 Ultra
Remote/Streaming Media Players - Harmony Elite, Apple TV 4, Nvidia Shield Pro - use with HDHomeRun Connect/Extend and Plex
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post #334 of 336 Old 04-28-2017, 11:13 AM
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Originally Posted by Sweetmeat View Post
I know this thread is a little old, so I apologize for bringing it back to life again :-)

I just bought a JVC RS420 projector, and I have an Elite CineTension 2 screen. I'm looking to buy 3D glasses for it, and want to confirm what I understood by reading the first several posts, and the post I'm replying to.

In the first post, it said something about the Elite screen had a 1 on the polarization retention, which was around 15-25%.

Based on the post above, it appears that it would be best for me to use vertically polarized glasses. Is that correct?
It will always be best to use JVC glasses that are horizontally polarized with a JVC projector. But as your screen material doesn't retain much of the polarization, you could get by with the cheaper glasses, and not see as much of a drop in brightness vs the JVC glasses. Yes the cheaper glasses will be dimmer than JVC glasses but with your screen I doubt you'd notice it.
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post #335 of 336 Old 04-28-2017, 11:16 AM
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Must the cheaper glasses be vertically polarized to use with my screen?


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PN59D8000 and JVC RS420 with Elite 120" screen
Receiver - Yamaha RX-A3060, WXA-50 MusicCast Amp for Zone 2
Front - CM9, Center - CMC2, Side Surrounds - DS3, Rear Surrounds - CM5, Front/Rear Atmos - CCM663, Subs - PB12+ and PB13 Ultra
Remote/Streaming Media Players - Harmony Elite, Apple TV 4, Nvidia Shield Pro - use with HDHomeRun Connect/Extend and Plex
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post #336 of 336 Old 04-29-2017, 01:35 PM
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Quote:
Originally Posted by alpin3r View Post
Has there been much progress recently in identifying and categorizing screen material based on their ability to retain polarization?

Looking for a screen that retains polarization to pair with my JVS RS500, which utilizes horizontally polarization for its 3D. Brightest and cleanest 3D image is seen with using the JVC glasses and a screen that retains polarization.

Probably looking for something around 1-1.3 gain.. hopefully under $800
In the last few years, I have tried the following screens with high polarisation retention capability :
- XtremScreen Daylight 0.9
- XtremScreen Daylight 1.1 Reference (original version and the current version)
- XtremScreen Daylight 2.0
- Drapper React 3.0 (it's version 3.0, gain is actually 1.0)

All of them can be considered to have very high polarisation retention for active 3D.
Passive 3D is an other story.

All of them can be used for passive 3D but they behave very differently : they all have a very similar polarisation retention in absolute terms (same brightness of the crosstalk for the same source) but the visual result changes dramatically due to the gain difference. The extinction ratio works like a contrast : the brighter the signal image is displayed (due to gain), the lesser the impact of the same amount of crosstalk.

The higher Xtremscreen with 2.0 Gain looks just as good as any good silverscreen with low enough crosstalk for any movie to be perfectly enjoyable. I bought one for my passive 3D setup.
The lower gain screens are barely acceptable for passive 3D. They work... but there are lots of scenes in most movies where crosstalk is very visible and annoys me.
I used the XtremScreen 1.1 for a while, and I'd say this is my tolerance limit for passive crosstalk (it's an amazing screen for 2D or active 3D though).
I would not use the Draper React or Xtremscreen 0.9 for passive 3D.

I can't say about prices. You'll need to ask each manufacturer/reseller for a quote. They tend to be expensive (especially the XtremScreens since they have an excellent reputation and are a market leader in my country)

Passive 3D, forever !
My Full-HD dual-projector passive polarised 3D setup. (really out of date ! I need to update it some day...)


Last edited by BlackShark; 04-29-2017 at 01:50 PM.
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