Single projector passiv 3d - Z-Screen
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 tthis type of Z-Screens for CRT monitors:

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

http://www.ebay.de/itm/330615718969?ssP ... 1423.l2649



These tools are rare, and I was looking for them quite some time bevor I found some I could afford.


As my curved silver screen is a distant dream, I did build a reaprojection screen for testing the Z-Screen with a Sony 1272 CRT projector. (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. As you know, you can avoid green ghosting with non P43 phosphor by adding more inactive lines to picture with powerstrip, the Nvidia customized resolutions, or Lumagen Radiance scalers. So I needed to add a little more front and back porches than with shutter glasses to eliminate green ghosting.


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 (solutions welcome - curve prefered), 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 (DLPs?)...?


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

Regards

Marc



Ps: I have permission from the seller now:




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
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 tthis type of Z-Screens for CRT monitors:



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



http://www.ebay.de/itm/330615718969?ssP
... 1423.l2649







These tools are rare, and I was looking for them quite some time bevor I found some I could afford.





As my curved silver screen is a distant dream, I did build a reaprojection screen for testing the Z-Screen with a Sony 1272 CRT projector. (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. As you know, you can avoid green ghosting with non P43 phosphor by adding more inactive lines to picture with powerstrip, the Nvidia customized resolutions, or Lumagen Radiance scalers. So I needed to add a little more front and back porches than with shutter glasses to eliminate green ghosting.





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 (solutions welcome - curve prefered), 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 (DLPs?)...?





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



Regards



Marc







Ps: I have permission from the seller now:









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

#1
Posted 10/03/2011 05:32 PM   
Hey! Cool .

I think I told you about nexnix screen material, no? /unsure.gif' class='bbc_emoticon' alt=':unsure:' />

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

You can use vacuum with their front screen, but maybe pure aluminium paint would work better because you can attain very high gain , like 5 plus. I think this FP fabric is about 1.8-2 gain.

For RP , its very cheap and looks good for rejecting ambient.

But why go for sequential polarized setup at all ?
- Rumor has it, brighter shutterglasses will be available soon, either those glasses or 'future glasses' would work better than pre-polarizated IMO.
Hey! Cool .



I think I told you about nexnix screen material, no? /unsure.gif' class='bbc_emoticon' alt=':unsure:' />



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



You can use vacuum with their front screen, but maybe pure aluminium paint would work better because you can attain very high gain , like 5 plus. I think this FP fabric is about 1.8-2 gain.



For RP , its very cheap and looks good for rejecting ambient.



But why go for sequential polarized setup at all ?

- Rumor has it, brighter shutterglasses will be available soon, either those glasses or 'future glasses' would work better than pre-polarizated IMO.

#2
Posted 10/03/2011 07:21 PM   
[quote name='tritosine2k' date='03 October 2011 - 11:21 AM' timestamp='1317669666' post='1302677']
Hey! Cool .

I think I told you about nexnix screen material, no? /unsure.gif' class='bbc_emoticon' alt=':unsure:' />

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

You can use vacuum with their front screen, but maybe pure aluminium paint would work better because you can attain very high gain , like 5 plus. I think this FP fabric is about 1.8-2 gain.

For RP , its very cheap and looks good for rejecting ambient.

But why go for sequential polarized setup at all ?
- Rumor has it, brighter shutterglasses will be available soon, either those glasses or 'future glasses' would work better than pre-polarizated IMO.
[/quote]

Hello,

and thanks for the input! I will hopfull be able to try both (fp and rp).

Well, I am doing all (active and passive). But without P43 Phosphor (fast one) you have ghosting on green. I can eliminate this with powerstip and costomized resolutions - in both, shutter glasses and shutter z-screens, I need insane high resolutions. I will get myself a Marquee CRT with P43 in the future for active... So dual projector setups are also my aim. Because with both, Z-Screen and dual setups, I can use big polarized clips over my evey day glasses and invite unlimited guests. For sure will I need a video processor to split the nvidia signal to two projectors.

Regards

Marc
[quote name='tritosine2k' date='03 October 2011 - 11:21 AM' timestamp='1317669666' post='1302677']

Hey! Cool .



I think I told you about nexnix screen material, no? /unsure.gif' class='bbc_emoticon' alt=':unsure:' />



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



You can use vacuum with their front screen, but maybe pure aluminium paint would work better because you can attain very high gain , like 5 plus. I think this FP fabric is about 1.8-2 gain.



For RP , its very cheap and looks good for rejecting ambient.



But why go for sequential polarized setup at all ?

- Rumor has it, brighter shutterglasses will be available soon, either those glasses or 'future glasses' would work better than pre-polarizated IMO.





Hello,



and thanks for the input! I will hopfull be able to try both (fp and rp).



Well, I am doing all (active and passive). But without P43 Phosphor (fast one) you have ghosting on green. I can eliminate this with powerstip and costomized resolutions - in both, shutter glasses and shutter z-screens, I need insane high resolutions. I will get myself a Marquee CRT with P43 in the future for active... So dual projector setups are also my aim. Because with both, Z-Screen and dual setups, I can use big polarized clips over my evey day glasses and invite unlimited guests. For sure will I need a video processor to split the nvidia signal to two projectors.



Regards



Marc

#3
Posted 10/04/2011 06:15 AM   
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
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

#4
Posted 10/04/2011 06:57 AM   
Do those old vesa plugs work with the newer vesa ports? Will they work with anything lower than 120 frame sequential?

So it seems that Samsung is taking this route with some of their TVs in 2012, as in adding the Zscreen type technolgy to their LCD panel so the users can wear passive glasses. Which are imagined to be quite expensive since it was the business, not consumer arm of Samsung that made the announcement. http://www.engadget.com/2011/01/04/samsung-reald-announce-rdz-tech-that-puts-active-shutter-3d-int/

Anyone know if the DLP-Link 3D MUX was for real or some kind of scam? I've never come across a post of an actual user reviewing it.

Yah, undoubtedly the best thing about passive projection, is the low cost of glasses for multiple users. The more the merrier and going big is truly more emmersive. BTW what is your target screensize for your future 2 PJ set up.
Do those old vesa plugs work with the newer vesa ports? Will they work with anything lower than 120 frame sequential?



So it seems that Samsung is taking this route with some of their TVs in 2012, as in adding the Zscreen type technolgy to their LCD panel so the users can wear passive glasses. Which are imagined to be quite expensive since it was the business, not consumer arm of Samsung that made the announcement. http://www.engadget.com/2011/01/04/samsung-reald-announce-rdz-tech-that-puts-active-shutter-3d-int/



Anyone know if the DLP-Link 3D MUX was for real or some kind of scam? I've never come across a post of an actual user reviewing it.



Yah, undoubtedly the best thing about passive projection, is the low cost of glasses for multiple users. The more the merrier and going big is truly more emmersive. BTW what is your target screensize for your future 2 PJ set up.

#5
Posted 10/04/2011 10:46 AM   
[quote name='D-Man11' date='04 October 2011 - 02:46 AM' timestamp='1317725194' post='1303037']
Do those old vesa plugs work with the newer vesa ports? Will they work with anything lower than 120 frame sequential?

So it seems that Samsung is taking this route with some of their TVs in 2012, as in adding the Zscreen type technolgy to their LCD panel so the users can wear passive glasses. Which are imagined to be quite expensive since it was the business, not consumer arm of Samsung that made the announcement. http://www.engadget.com/2011/01/04/samsung-reald-announce-rdz-tech-that-puts-active-shutter-3d-int/

Anyone know if the DLP-Link 3D MUX was for real or some kind of scam? I've never come across a post of an actual user reviewing it.

Yah, undoubtedly the best thing about passive projection, is the low cost of glasses for multiple users. The more the merrier and going big is truly more emmersive. BTW what is your target screensize for your future 2 PJ set up.
[/quote]


Yes, the plug and the signal are the same. The screens work from 40hz to 200HZ! Tested them down to 60hz and up to 144hz. 640x480 at 60hz to 1920x1200 at 100hz, and everything in between like 1280x720p 120/144hz or 1080p120hz.

Screen size: for rp I think 100" curve screen at 50" eye distance and fp 150" DIY aluminium coated curve screen at 100" eye distance
[quote name='D-Man11' date='04 October 2011 - 02:46 AM' timestamp='1317725194' post='1303037']

Do those old vesa plugs work with the newer vesa ports? Will they work with anything lower than 120 frame sequential?



So it seems that Samsung is taking this route with some of their TVs in 2012, as in adding the Zscreen type technolgy to their LCD panel so the users can wear passive glasses. Which are imagined to be quite expensive since it was the business, not consumer arm of Samsung that made the announcement. http://www.engadget.com/2011/01/04/samsung-reald-announce-rdz-tech-that-puts-active-shutter-3d-int/



Anyone know if the DLP-Link 3D MUX was for real or some kind of scam? I've never come across a post of an actual user reviewing it.



Yah, undoubtedly the best thing about passive projection, is the low cost of glasses for multiple users. The more the merrier and going big is truly more emmersive. BTW what is your target screensize for your future 2 PJ set up.







Yes, the plug and the signal are the same. The screens work from 40hz to 200HZ! Tested them down to 60hz and up to 144hz. 640x480 at 60hz to 1920x1200 at 100hz, and everything in between like 1280x720p 120/144hz or 1080p120hz.



Screen size: for rp I think 100" curve screen at 50" eye distance and fp 150" DIY aluminium coated curve screen at 100" eye distance

#6
Posted 10/04/2011 06:56 PM   
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