I designed and built this table to demonstrate PhoneTouch, a novel interaction technique for integrating mobile phones and interactive surfaces (presented as technote and demo at UIST 2010, and as demo at ITS 2010). As the conferences required some travelling, I decided to design the table to fit into my suitcase (the active surface itself is about 60x45cm).
The frame is constructed using Bosch-Rexroth aluminium profiles (30x30mm). Since PhoneTouch requires high sampling rates, we decided for a PointGrey Grasshopper camera (up to 200Hz at 640x480px). As projector, a LG HX300G is used (1024x768px at only 700g, without AC adaptor).
The table is based on FTIR and its surface is made of an 8mm clear acrylic sheet, with a compliant silicone layer and waterproof drafting film on top. The infra-red LEDs are directly mounted inside the profiles. It takes about 2hrs to assemble and set up the table (including calibration); disassembling is usually a bit faster.