CurtPalme.com Home Theater Forum

[noos@xp37+]

Hello,

as you know, there are two ways for passive 3d (non active non shuttering "sun" glasses - like in cinemas):

- using two projectors and polarization filters in front of the projector

- using a z-screen in front of the projector (like cinemas do)

I planned to do the first solution in the future, so I am way behind in building my curved high gain silver screen - because as you know - you need a screen that keeps the light polarization. So it should be a silver like screen, that should be curved because of hotspotting, or you use a rear projection screen that has this specific feature.

But I now got these Z-Screens for CRT monitors:

http://www.mfb-geo.com/spip.php?rubrique83

These tools are rare, and I was looking for them quite some time.
As my silver screen is a distant dream, I did build a reaprojection screen for testing the Z-Screen with a 1272. For 7" AC an 8" LC machines one Z-Screen is fine. With 8" AC or 9" you should use two Z-Screens.

I did test these screens with crt monitors, and as the Barco pdf shows, they have a little more ghosting and are a bit dimmer than shutter glasses solutions. But I was able to use also the cinema glasses from Avatar....

The screens accept the standard 3d sync signal. But, my reaprojection screen does not keep the polarization, so I will get me a different material or build the curvesd silver screen an update the process here.

I guess these screens should also work with digitals that are not polarized like LCDs are (DLP?)...?


The seller has some of them left on the shelves. They cost a fraction of their high 4 digits price in the ninties - and I will ask him if I can post his email here for contact. I will also post that report on AVS and mtbs, but I will give you here an advance for the Z-screens, if the seller clears his shelves.

... I keept my writing short, as I will update my findings when I found a screen material taht keeps polarization.

Regards

Marc

[CIR Engineering]

Interesting concept. I have not seen these before.

craigr

[Tim in Phoenix]

Guys


The requirement of a silver lenticular screen will render this awkward for most home users.


.

[noos@xp37+]

....for those who want to read about 3D projection screens, here is a very good one:

http://www.avsforum.com/avs-vb/showthread.php?t=1300238

Regards

[noos@xp37+]

So, I now have permission and details from the seller of these Z-Screens:


mark_frnka@comcast.net



You can write to him, but in the subject you should mention Z-Screens. He is selling medical equipment, so I guess these screens were intended to use in 3D applications in an hospital or clinic, but never were used. He has a couple of these Z-Screens, and they are all brand new an in the original package. They come with cables and controller plus three passive glasses. But you can use the cinema glasses, so I guess these screens a circular polarized. I fear that day when I will have to buy circular polarized sheets for a dual projector setup with CRTs ($$$). Considering this, the condition of the screens, the insane prices some companys (that have probably misses digital revolution) ask for these screens, and that they are rare like hen´s teeth - 150$ for one screen is a steal. I am sure the seller will give you two for 250$. He is located in the US, but he is shipping worldwide. He did pack two screens for me in one original package, and shipped it to Germany for 63$.



Ragards


Marc

[noos@xp37+]

Hello,

the seller of these screens is now on Ebay. I am sure he has more than this screen:

http://www.ebay.com/itm/250902929575?ssPageName=STRK:MESELX:IT&_trksid=p3984.m1558.l2649

I will go for this material to build my rearprojector:

http://www.nexnix.co.uk/3d/3d_projection_screen_material.php

Best regards

Marc