<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
<html>
<head>
<meta content="text/html; charset=ISO-8859-1"
http-equiv="Content-Type">
</head>
<body bgcolor="#ffffff" text="#000000">
Hi Greg,<br>
<br>
Both DepthQ and Christie (made in fact by the same manufacturer.
<a class="moz-txt-link-freetext" href="http://www.depthq.com/projector.html">http://www.depthq.com/projector.html</a>;
<a class="moz-txt-link-freetext" href="http://www.depthq.com/christie.html">http://www.depthq.com/christie.html</a>) are, as expected, sold in
France by a unique firm.<br>
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!).<br>
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.<br>
Can you, please, comment on all these issues and eventually let me
know if I can go along with DepthQ DLP?<br>
Many thanks in advance.<br>
<br>
Best,<br>
<br>
Nadir<br>
<br>
<pre class="moz-signature" cols="72">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
France
Phone: +33 (0)3.83.68.32.73
Fax: +33 (0)3.83.68.32.79
E-mail: Nadir.Mrabet <at> medecine.uhp-nancy.fr
Cell.: +33 (0)6.11.35.69.09
LEGAL NOTICE
Unless expressly stated otherwise, this message is confidential and may
be privileged. It is intended for the addressee(s) only.
Access to this E-mail by anyone else is unauthorized.
If you are not an addressee, any disclosure or copying of the contents
of this E-mail, or any action taken (or not taken) in reliance on it,
is unauthorized and may be unlawful.
If you are not an addressee, please inform the sender immediately.
</pre>
<br>
On 28/09/2010 12:59, Greg Couch wrote:
<blockquote cite="mid:4CE54117.7060909@medecine.uhp-nancy.fr"
type="cite">
<meta http-equiv="content-type" content="text/html;
charset=ISO-8859-1">
<br>
<table class="moz-email-headers-table" border="0" cellpadding="0"
cellspacing="0">
<tbody>
<tr>
<th nowrap="nowrap" align="RIGHT" valign="BASELINE">Subject:
</th>
<td>Re: [Chimera-users] 3D stereo</td>
</tr>
<tr>
<th nowrap="nowrap" align="RIGHT" valign="BASELINE">Date: </th>
<td>Tue, 28 Sep 2010 12:59:13 -0700</td>
</tr>
<tr>
<th nowrap="nowrap" align="RIGHT" valign="BASELINE">From: </th>
<td>Greg Couch <a moz-do-not-send="true"
class="moz-txt-link-rfc2396E"
href="mailto:gregc@cgl.ucsf.edu"><gregc@cgl.ucsf.edu></a></td>
</tr>
<tr>
<th nowrap="nowrap" align="RIGHT" valign="BASELINE">To: </th>
<td><a moz-do-not-send="true"
class="moz-txt-link-abbreviated"
href="mailto:Nadir.Mrabet@medecine.uhp-nancy.fr">Nadir.Mrabet@medecine.uhp-nancy.fr</a></td>
</tr>
<tr>
<th nowrap="nowrap" align="RIGHT" valign="BASELINE">CC: </th>
<td><a moz-do-not-send="true"
class="moz-txt-link-abbreviated"
href="mailto:Chimera-users@cgl.ucsf.edu">Chimera-users@cgl.ucsf.edu</a></td>
</tr>
</tbody>
</table>
<br>
<br>
<pre> 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,
<a moz-do-not-send="true" class="moz-txt-link-freetext" href="http://www.depthq.com/">http://www.depthq.com/</a>, and RealD,
<a moz-do-not-send="true" class="moz-txt-link-freetext" href="http://www.reald.com/Content/professional.aspx">http://www.reald.com/Content/professional.aspx</a>. 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
</pre>
</blockquote>
</body>
</html>