[Chimera-users] Fwd: Re: 3D stereo

Nadir T. Mrabet Nadir.Mrabet at medecine.uhp-nancy.fr
Fri Nov 19 09:14:54 PST 2010

Hi Greg,

Both DepthQ and Christie (made in fact by the same manufacturer. 
http://www.depthq.com/christie.html) are, as expected, sold in France by 
a unique firm.
They say that DepthQ HDs3D-1 ($2,995) has no capability for 3D for a 
conference room with 30-50 people, and that my only option is Christie 
(> $65,000!).
Your earlier mail states that DepthQ can go along with a 3-meter size 
screen, suggesting it could accommodate an audience of 30-50 people.
Can you, please, comment on all these issues and eventually let me know 
if I can go along with DepthQ DLP?
Many thanks in advance.



Pr. Nadir T. Mrabet
Structural&  Molecular Biochemistry
Nutrigenex - INSERM U-954
Nancy University, School of Medicine
9, Avenue de la Foret de Haye, BP 184
54505 Vandoeuvre-les-Nancy Cedex
Phone: +33 (0)
Fax:   +33 (0)
E-mail: Nadir.Mrabet<at>  medecine.uhp-nancy.fr
Cell.: +33 (0)

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On 28/09/2010 12:59, Greg Couch wrote:
> Subject: 	Re: [Chimera-users] 3D stereo
> Date: 	Tue, 28 Sep 2010 12:59:13 -0700
> From: 	Greg Couch <gregc at cgl.ucsf.edu>
> To: 	Nadir.Mrabet at medecine.uhp-nancy.fr
> CC: 	Chimera-users at cgl.ucsf.edu
>   On 07/21/2010 07:24 AM, Nadir T. Mrabet wrote:
> >  Hi,
> >
> >  This is for teaching purposes so that students can "walk" though 3D structures. Would it be possible to use Chimera via a 3D stereo beamer to project display on a very large screen and watch the selected structure in 3D by means of shutter glasses?  If this is so, what kind of equipment would you recommend?
> >
> >  Many thanks,
> >
> >  Nadir
> So there were some developments at SIGGRAPH, but nothing that would
> change the previous recommendations made in the chimera-users mailing list.
> To summarize, for a large group of people, you want a setup similar to
> what is done for 3D movies in a movie theater, which is to use left-hand
> and right-hand circularly polarized light for the left-eye and right-eye
> images.  There are three parts to the setup: (1) projecting the stereo
> images, (2) reflecting the images, (3) receiving the images at the eyes.
> 1. For projecting the stereo images with chimera, you need a
> workstation-class graphics card, either an AMD FirePro (or ATI FireGL)
> or a NVIDIA Quadro (or Quadro FX, not Quadro NVS), and either (a) two
> projectors with passive polarizers, or (b) a single projector with an
> active polarizers.  The single projector method is much simpler to
> maintain because you don't have to keep aligning the two projectors, but
> may cost more because the projector has to be able to display at 120Hz
> (and there's the cost of the active polarizer).  The relative costs of
> the two options vary.  Active polarizers are available from DepthQ,
> http://www.depthq.com/, and RealD,
> http://www.reald.com/Content/professional.aspx.  DepthQ also sells a 3D
> projector that can display 3 meter wide images, and has European
> distributers, so that might be the best choice.  If you want a larger
> image, you'll need a Christie Mirage or a Barco projector.
> 2. To reflect the stereo images, you need a screen that doesn't change
> the polarization of the light.  There are lots of choices.  Google for
> "3D projection screen" to see what's available.  What screen you want
> depends on the layout of the room that the stereo projection will be
> in.  Narrow rooms can use screens with a smaller viewing cone and higher
> gain.  I've heard good things about Stewart Filmscreen, but get
> recommendations from whoever you buy your projector too.
> 3. Last part of making sure each eye only receives the image it is
> supposed to is for the person to wear circularly polarized glasses.
> Google for "polarized 3d glasses" to see what's available.  I'd avoid
> the disposable paper ones.  I like the RealD glasses that the movie
> theaters use.  Perhaps a theater would sell some to you.  The glasses
> from Zalman displays work too.
>      Bon chance,
>      Greg
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