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jarseneau
Joined: 06 Nov 2007
Posts: 323
Location: WI
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| Posted: Mon Dec 22, 2014 6:43 pm Post subject: 3D using 2 G90's |
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What do I need if I want an active shutter 3D setup using 2 G90s? I've tried an OPTOMA 3D-XL with one projector but I get a dark band at the top and haven't found a way to adjust it out as I don't believe the OPTOMA can change that or if that is even the problem. For sources I have an HTPC and PS3 which have run 3D via the OPTOMA.
My current signal chain is 3D HTPC or PS3>Marantz 7701 pre-pro>OPTOMA>Moome HDMI 3D input card
So my basic questions:
Does running 2 PJ's work better for active shutter 3D?
What 3D processors would be able to drive 2 projectors?
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Jerry
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CasetheCorvetteman
Joined: 09 Nov 2008
Posts: 6326
Location: Australia
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| Posted: Wed Dec 24, 2014 3:48 am Post subject: |
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Add a few blank lines to the top of the image, that will move the bar up off the active image.
Youre better off with a projector designed for stereoscopic 3D if you want to go that far as to install two machines, you may as well use two 3D Fury units and passive polarised glasses.
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jarseneau
Joined: 06 Nov 2007
Posts: 323
Location: WI
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| Posted: Fri Dec 26, 2014 5:34 pm Post subject: |
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Thanks Case,
I had tried blanking out the band but it wasn't enough but it did reduce it. I know the real issue is the timing between the shutter and the image.
I think I'll put the stack idea on hold for now since I've read that it won't work with screens much under 10' wide due to the extreme linearity adjustment needed for side by side and I have a lowly 8' wide screen that I'm quite happy with.
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Jerry
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CIR Engineering
Joined: 25 Aug 2008
Posts: 4269
Location: Chicago USA & Berlin Germany
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| Posted: Sat Dec 27, 2014 4:50 am Post subject: |
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Imagining the best, I'd think you could stack your G90's with your screen. However, I would consider passive 3D over active 3D for the pinnacle of performance. I would strongly consider a passive 3D system if I were going to go all out for 3D with two CRT projectors. You would have virtually no ghosting if you did it right. It would take at least two radiance processors (three would be better) and polarizing filters for both projectors (at least that's how I would do it though there are other ways as it's been done for more than 20 years now).
Let's say you have three Radiance processors, the first would be used for calibration and the two outputs would go to the next Radiance processors. Each of these would handle half the 3D; right eye and left eye to split the signal and output 1080p 48Hz to each projector (or 72Hz or whatever). You could use two screens from broken LCD TV's to use as polarizing filters...
It would be a fun, but silly project 
I've seen a similar system with three Radiance processors using two DPI Titan projectors. It does work, but the price is not cost effective.
craigr
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CasetheCorvetteman
Joined: 09 Nov 2008
Posts: 6326
Location: Australia
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| Posted: Sat Dec 27, 2014 7:51 am Post subject: |
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It would be a hell of a big job, and sure would cost alot!!
_________________
Barco Cine 9, ,Sony VPL570ES 4K SXRD, 135" OZ Theatre Majestic 16:9 screen, Denon X6700in preamp mode, 2x 7ch Tonewinner amps, 2x Tonewinner 15" subs, 2x 10" subs, 7.2.6...
RUNCO DTV991 LC ( NEC XG 852 LC ) 100" 4:3 screen, H/K AVR 7.1...
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jarseneau
Joined: 06 Nov 2007
Posts: 323
Location: WI
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| Posted: Mon Dec 29, 2014 2:32 am Post subject: |
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PostPosted: Fri Dec 26, 2014 10:50 pm Post subject:
Imagining the best, I'd think you could stack your G90's with your screen. However, I would consider passive 3D over active 3D for the pinnacle of performance. I would strongly consider a passive 3D system if I were going to go all out for 3D with two CRT projectors. You would have virtually no ghosting if you did it right. It would take at least two radiance processors (three would be better) and polarizing filters for both projectors (at least that's how I would do it though there are other ways as it's been done for more than 20 years now).
Let's say you have three Radiance processors, the first would be used for calibration and the two outputs would go to the next Radiance processors. Each of these would handle half the 3D; right eye and left eye to split the signal and output 1080p 48Hz to each projector (or 72Hz or whatever). You could use two screens from broken LCD TV's to use as polarizing filters... |
   Whew. Talk about shock and awe, but that does sound cool. Could a single Radiance 2020 calibrate its 2 outputs separately for the 2 pj's so each output is uniquely calibrated? For 3D it sounds like any single processor gives you the option to output sequential frames out 1 HDMI output or non-sequential of one eye. Then you use polarizing to separate the 2 for each eye.
At the moment I have an Optoma 3d-XL and will be getting the 2020 soon. I wonder if I can use the Optoma for one pj and run the 2020 at the same resolution for the other eye as a quick and dirty way to make it work?
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Jerry
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