Hi Greg, Both DepthQ and Christie (made in fact by the same manufacturer. http://www.depthq.com/projector.html; 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. Best, Nadir 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. 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@cgl.ucsf.edu> To: Nadir.Mrabet@medecine.uhp-nancy.fr CC: Chimera-users@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