MARK is a couch table equipped with an integrated PC and a multi-touch capable display.
We built two versions:

Mark I: is designated as prototype in order to get in touch with the technology.
Mark II: is an improved version, which we used to simplify the construction and fix problems.

Mark I Mark II Render


  • LCD Display
  • Infrared optical based (DSI or FTIR possible)
  • 20 touch points (configured software limit)
  • Integrated PC
  • Powered by Linux or Windows


Theory behind the used technology:

We use the Diffused Surface Illumination as infrared optical multi-touch technique. It uses a special acrylic glass that contains tiny particles, that scatter the infrared light over the whole plane. As soon as a finger or an object is placed on the surface, it reflects the infrared light which is then caught by an infrared camera at the base of the table. Hotspots are visible on the picture shot by that camera accordingly.

For a closer look into DSI and the other infrared optical multi-touch technologies check out the Community Book of the NuiGroup.

Mark I

The MARK I is the prototype and first version of the MARK multi-touch couch table.
It was build to get in touch with the technology to be able to construct that kind of tables.


  • uses Diffused Surface Illumination (DSI)
  • 24″ – 1920 x 1080
  • Core i3- 2105
  • Intel HD3000 Graphics
  • 4GB Ram
  • 1TB HDD
  • 430W power supply
  • 100 IR- LEDs
  • 114 white LEDs



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Presentation of the MARK I at the Open Hard- & Software Workshop in Munich, December 2011 (in German)

Slides can be found here.

Windows 8 Developer Preview:

Bodhi Linux:


Mark II


  • uses Diffused Surface Illumination (DSI)
  • 27″ – 1920 x 1080
  • Core i3- 2105
  • Intel HD3000 Graphics
  • 4GB Ram
  • 500 GB HDD
  • 430W power supply
  • 200 IR- LEDs
  • 150 white LEDs