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42” DI/FTIR Table (with plans)
Posted: 27 February 2009 09:34 AM   [ Ignore ]
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Multi-Touch Research Platform (Lancaster University, UK)

tableCollage.png table_photo_rendering_width.png

Hi everyone,

first, thanks a lot for all the inspiration and helpful information that can be found on these pages! Finally I managed to put together some more detailed information about the multi-touch table we built. The design is quite flexible and it can be used with either DI or FTIR. It features the following components:
<ul><li>91x57cm surface (107cm diagonal, 16:10 aspect ratio)</li><li>Toshiba TDP‐EW25 projector (1280x800px)</li><li>Point Grey Firefly MV camera (640x480px, 60fps) with wide-angle lense</li><li>Infrared illumination (850nm)</li><li>Bosch Rexroth aluminium frame</li></ul>

There is more information on the table setup, including a technical report with some building instructions and drawings.

-- Dominik

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plans.pdf  (File Size: 1111KB - Downloads: 2260)
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Posted: 27 February 2009 01:28 PM   [ Ignore ]   [ # 1 ]
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Awesome guys.  Looks very well done.  Any videos of it in action?

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Posted: 27 February 2009 01:43 PM   [ Ignore ]   [ # 2 ]
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wow, looks good.

nice design

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34” FTIR

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Posted: 27 February 2009 03:49 PM   [ Ignore ]   [ # 3 ]
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Hell yeah i used blue tac on my ND filter too!  ( although i presume thats a hot mirror? ) Nice frame expensive stuff!

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Posted: 28 February 2009 01:59 AM   [ Ignore ]   [ # 4 ]
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Very well done, congratulations!

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Posted: 01 March 2009 08:41 AM   [ Ignore ]   [ # 5 ]
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Thanks, guys! Concerning the action videos: I should put up something soon.

And yes, it’s a hot mirror smile.

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Posted: 01 March 2009 02:16 PM   [ Ignore ]   [ # 6 ]
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Very well done guys, hope to see a video of it working soon. I really like the design of the box looks like you guys put a lot of effort into it. Good Job!

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Posted: 15 March 2009 03:17 PM   [ Ignore ]   [ # 7 ]
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Wow, this is good looking!
What’s the material you used for the box?
I also thought about something like that, but isn’t it very susceptible for scratches?

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Posted: 16 March 2009 08:49 AM   [ Ignore ]   [ # 8 ]
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Thanks! The frame itself is made out of 40x40mm aluminium profile. For the case we used 3mm black acrylic sheets.

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Posted: 18 March 2009 12:11 AM   [ Ignore ]   [ # 9 ]
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Brilliant design! How much does it cost to build this table?

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Posted: 18 March 2009 02:51 AM   [ Ignore ]   [ # 10 ]
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Thanks a lot… parts were around £3000, although it’s a bit difficult to say exactly, since not all the part orginally ordered were used in the end.

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Posted: 22 October 2009 04:40 AM   [ Ignore ]   [ # 11 ]
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Hi everyone,

just updated the technical report (http://eprints.comp.lancs.ac.uk/2215/) - it now includes a description of the new DSI setup, using:
<ul>
<li>EndLighten acrylic sheet with an IR LED ribbon around its edges, and on top a</li>
<li>rear projection acrylic sheet, which provides a better touch sensation and is longer lasting then the previously used polyester film</li>
</ul>

Dominik

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http://eis.comp.lancs.ac.uk/~dominik/cms/

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Posted: 22 October 2009 03:31 PM   [ Ignore ]   [ # 12 ]
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nice job mate? is th balck acrylic expensive?
we have just built a beauty of a frame/case and i think it would be nive to cover ours in it.
regards
Tim Hawkes

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Posted: 23 October 2009 07:52 AM   [ Ignore ]   [ # 13 ]
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The black acrylic was not too expensive, around £70 total for the 4 sides.

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Posted: 28 October 2009 01:27 AM   [ Ignore ]   [ # 14 ]
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Nice
what material is your surface, I like your table so I think next time round i will use your guide, But I have allready got my opal30(80% transperant) acrylic, Do you think this will work
regards
Tim

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Posted: 29 October 2009 04:19 AM   [ Ignore ]   [ # 15 ]
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It is 8mm Endlighten (0N002 XL) with a 5mm rear-projection acrylic sheet (7D006 RP) on top. Don’t have any experiences with the opal30, sorry.

Dominik

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Posted: 29 October 2009 06:48 AM   [ Ignore ]   [ # 16 ]
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any ideas on how to get a rectangle image 82x67 on tomy surface withnone mirror, i am currently gettin a trampezium?
tim

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Posted: 05 November 2009 11:30 AM   [ Ignore ]   [ # 17 ]
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I’m sure Opal acrylic won’t work. The projected image will likely be too diffused.

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Posted: 05 November 2009 11:50 AM   [ Ignore ]   [ # 18 ]
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Regarding the trapezium: I guess you would have to change the angle between projector and surface.

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Posted: 08 November 2009 07:17 AM   [ Ignore ]   [ # 19 ]
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we player around with our mirrors, out box is in two peices one for a base which connects two a a top, will try to post pics. But about that when i was presenting around 20 mins before the top snagged on my blazez so then it slipped causing the mirrors to move.

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Posted: 11 November 2009 03:27 AM   [ Ignore ]   [ # 20 ]
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how does yours pick up blobs so well and what are your machine spcecs
could u post a screen snip of ccv so i can i get a better idea on the settings
Regards
Tim

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