Multitouch Diffused Rear Illumination demo

This is a diffused rear illumination multitouch display that I built. Some specs for the system:

CPU: Intel Core 2 Duo 2.33GHz with 2GB of ram
Camera: V-gear Talkcam Tracer CCD
Projector: Panasonic XGA projector with short throw lens
IR source: 100 TSAL6100 950nm IR leds
Surface: Glass
Projection material: Architect vellum (tracing paper)
Software: OSC, touchlibflash and Media App v2.
More info: nuigroup.com

Category:

Howto & Style

Tags:

• multitouch
• diffused
• illumination
• nuigroup

[Pvsmuntje]

So you used a piece of plexiglass with tracing paper on top, and put the projector, camera and the 2 illuminators underneath? Are that the only materials you used?

Thanks.

[tzywen]

@Pvsmuntje yes that's basically all.

[Pvsmuntje]

@tzywen Thanks for the fast reply! Could you please tell me how many webcams you used?

[tzywen]

@Pvsmuntje just one. i used a wide angle lens

[Pvsmuntje]

@tzywen Wow, really fast reply. o.o

Which webcam did you use that has this wide angle lens?

[tzywen]

@Pvsmuntje i used the v-gear talkcam tracer ccd webcam. It has a screw in lens that can be changed. I bought a wide angle lens for use in security cameras (cctvs).

[Mythiasis]

Doing research and thinking of building one for myself. However, the one I have in mind will be like 36" x 36". How thick of a surface (I assume acrylic) did you get? Some other specs show 5mm, but at 36"x36" I'm thinking more along the lines of a half inch; possibly sand frosted as my diffuser rather than vellum or tracing paper.

[tzywen]

i used architect tracing paper.

[seahawk4lyfe]

hay dude im making one of these, what did u use for the rear projection??