23" LCD LLP Multi Touch Prototype Table (IR Laser)

This is a prototype system I built for an interactive coffee table I am building. Now that it works, I need to modify the cabinet for it.

Nevermind the bright light around it. The image quality will be brighter once it is fully enclosed.

4x780nm IR lasers
PS3 Eye camera with 780nm filter
Dell 23" Widescreen LCD
Inspiron 1501
Windows 7 x64

Needs more horsepower. The AMD processor just isn't cutting it.

Category:

Science & Technology

Tags:

• multi touch
• lcd
• llp
• laser
• ir
• table

[locker47]

Would you have any references (web links, tutorials, communities) or schematics on how to build similar setups based on IR lasers and cameras? Quite new to this, and I'm thinking of making something similar as a pet project.

[team140]

@locker47 Check out nuigroup.com

[jonidimo]

I know that the laser is mounted parallel to the screen, but how does it create a uniform spread across the glass?

[team140]

@jonidimo It's done with a Laser Line Generator - basically a prism based lens that takes the thin pinpoint and flattens it out to a fan shape.

[team140]

Actually, there are no IR emitter diodes in this setup. The IR lasers are positioned at all four corners and project a 120* horizontal plane about 1mm above the surface of the screen. As soon as your finger breaks the laser light plane, the camera below picks it up.

[Ccoolty]

did i see a nipple in one of those pictures?

[vinczeee]

@rasmasyean the camera only picks up IR light, small diodes run IR light through a sheet of glass on top of the display, when your fingera are touching the surface ther camera sees them

[rasmasyean]

cool.

Where are these?

4x780nm IR lasers

PS3 Eye camera with 780nm filter

What do they do?