Introduction: How to Build an Optical Multitouch Setup: FTIR, Rear DI, LLP, DSI, LED-LP (VIDEO TUTORIALS)
So you may have seen tons of people making their own Multitouch tables and you just couldn't figure out everything you need to do to build one successfully... well, here is the Instructable you've been looking for.
This small project was a long time coming. I wanted to create a box that could be easily changed into whatever optical multitouch technique I wanted. The 5 major techniques are FTIR, Rear DI, DSI, LLP, and LED-LP.
The box was a simple 5 sided box constructed out of MDF. It has one of my favorite projectors in it, Toshiba’s ultra short throw TDP-EW25U (discontinued). The camera used was an m12 PS Eye Camera in our custom acrylic box, with a varifocal m12 2.6-6mm lens. The projected image was about the size of a 22 inch screen (16:10 ratio).
Watch the first two videos to learn about everything hardware related to setting each of these methods up. The last 5 videos are separated in different steps with a single video and list of parts used, so you can skip ahead to the one you may be more interested in. If you’re new to all of this, just start the first two, sit back and enjoy:
For help with your projects check out the largest MT community in the world at http://nuigroup.com/forums/.
More information can be found at the Peau Productions website, and all products seen in these videos can be purchased at the Peau Productions store.
This small project was a long time coming. I wanted to create a box that could be easily changed into whatever optical multitouch technique I wanted. The 5 major techniques are FTIR, Rear DI, DSI, LLP, and LED-LP.
The box was a simple 5 sided box constructed out of MDF. It has one of my favorite projectors in it, Toshiba’s ultra short throw TDP-EW25U (discontinued). The camera used was an m12 PS Eye Camera in our custom acrylic box, with a varifocal m12 2.6-6mm lens. The projected image was about the size of a 22 inch screen (16:10 ratio).
Watch the first two videos to learn about everything hardware related to setting each of these methods up. The last 5 videos are separated in different steps with a single video and list of parts used, so you can skip ahead to the one you may be more interested in. If you’re new to all of this, just start the first two, sit back and enjoy:
For help with your projects check out the largest MT community in the world at http://nuigroup.com/forums/.
More information can be found at the Peau Productions website, and all products seen in these videos can be purchased at the Peau Productions store.
Step 1: Frustrated Total Internal Reflection (FTIR)
FTIR
* MDF Wooded Support Frame
* Aluminum L Channel
* 8mm Infrared LED Ribbon
* 60 Watt Power Driver
* 18 x 26 inch ACRYLITE FF (extruded)
* Compliant Layer Composed of 1:1 Mixture of Clear Silicon and Xylene (Rolled Onto Vinyl Using Tinkerman Method – 4 Layers)
* 18 x 26 inch Ridout White Vinyl Polish/Matte Sides
* MDF Wooded Support Frame
* Aluminum L Channel
* 8mm Infrared LED Ribbon
* 60 Watt Power Driver
* 18 x 26 inch ACRYLITE FF (extruded)
* Compliant Layer Composed of 1:1 Mixture of Clear Silicon and Xylene (Rolled Onto Vinyl Using Tinkerman Method – 4 Layers)
* 18 x 26 inch Ridout White Vinyl Polish/Matte Sides
Step 2: Diffused Surface Illumination (DSI)
DSI
* MDF Wooded Support Frame
* Aluminum L Channel
* 8mm Infrared LED Ribbon
* 60 Watt Power Driver
* 18 x 26 inch ACRYLITE Endlighten L
* 19 x 27 inch ACRYLITE Rear Projection Grey 7D512 RP
* MDF Wooded Support Frame
* Aluminum L Channel
* 8mm Infrared LED Ribbon
* 60 Watt Power Driver
* 18 x 26 inch ACRYLITE Endlighten L
* 19 x 27 inch ACRYLITE Rear Projection Grey 7D512 RP
Step 3: Laser Light Plane (LLP)
LLP
* 19 x 27 inch ACRYLITE FF (extruded)
* 3mm Clear Acrylic (Small Support Pieces Under Lasers) + 8 Bolts and Nuts for Laser Position Adjustments
* (2) 850nm 5mW Lasers
* (2) Laser Line Generators
* Laser Power Adapter
* Laser Safety Goggles
* Ridout White Vinyl Polish/Matte Sides
* 19 x 27 inch ACRYLITE FF (extruded)
* 3mm Clear Acrylic (Small Support Pieces Under Lasers) + 8 Bolts and Nuts for Laser Position Adjustments
* (2) 850nm 5mW Lasers
* (2) Laser Line Generators
* Laser Power Adapter
* Laser Safety Goggles
* Ridout White Vinyl Polish/Matte Sides
Step 4: Rear Diffused Illumination (Rear DI)
Rear DI
* 19 x 27 inch ACRYLITE FF (extruded)
* 19 x 27 inch ACRYLITE Rear Projection Grey 7D512 RP
* 4 Bar 850nm Infrared LED Kit
* 25 Infrared 850nm Module Kit
* 19 x 27 inch ACRYLITE FF (extruded)
* 19 x 27 inch ACRYLITE Rear Projection Grey 7D512 RP
* 4 Bar 850nm Infrared LED Kit
* 25 Infrared 850nm Module Kit
Step 5: LED Light Plane (LED-LP)
LED-LP
* 19 x 27 inch ACRYLITE FF (extruded)
* 19 x 27 inch ACRYLITE Rear Projection Grey 7D512 RP
* Aluminum L Channel
* (80) 850nm LEDs OSRAM SFH4550
* Modified Computer ATX Power Supply Outputting 12 volts
* 19 x 27 inch ACRYLITE FF (extruded)
* 19 x 27 inch ACRYLITE Rear Projection Grey 7D512 RP
* Aluminum L Channel
* (80) 850nm LEDs OSRAM SFH4550
* Modified Computer ATX Power Supply Outputting 12 volts
Step 6: Conclusion
For help with your projects check out the largest MT community in the world at http://nuigroup.com/forums/.
More information can be found at the Peau Productions website, and all products seen in these videos can be purchased at the Peau Productions store.
