A Set of functional Requirements

1. Multipoint: Detects multiple, simultaneous touches.

2. User identification: Detects which user is touching the table.

3. Debris Tolerant: Objects left on the surface do not interfere with normal operation.

4. Durable: Able to withstand normal use without frequent repair or re-calibration. Should be a minimal maintainance unit.  Since the table is an everyday object, low maintainance will be critical to its acceptance. {Jonas Trümper, 2007, “Human-Computer Interaction” im SS 2007 an der TU Berlin}

5. Unencumbered: No additional devices should be required for use – e.g. no special stylus, body transmitters, etc.

6. Inexpensive to manufacture.

7. No power button or booting process.



This is not a detailed set of instructions for building the table.  We can, however, make some suggestions where you can start.

Basic Multitouch Table

The Do-It-Yourself Way:

A good place to start is here:


The two basic hardware technologies used are a) Frustrated Total Internal Reflection (FTIR) and b) Diffused Illumination (DI).

You can find lots! of information in the NUIgroup Wiki

Prebuilt Solutions:

Manufacturers of ready-to-use tables include:

MT Cell

Perceptive Pixel

User Recognition

Hardware supporting user recognition is available from:

Diamond Touch

via the pens (Anoto)


The Resting Hand Gesture

Hand Recognition


Hello, my name is Dominic Kennedy. This page is about the bachelor thesis i am currently writing, under the supervision of Prof. Dr.-Ing. Thomas Ritz and Dipl.-Designer Tim Bruysten at the Fachhochschule Aachen, Germany. The aim is to improve small group design meetings (2-6 people). It is a concept for a multi touch tabletop computer. Professors / Supervisors If you have anything to contribute, please use the comment form or contact me via email.




Creative Commons License
"Resting Hand Gesture"
by Dominic Kennedy