Virtual laser keyboard

[fastrod]

hi all
i am looking for stylish rig. so i have decided to go for laser keyboard, but i don't have enough information about it like is they work fine or what is their technology and other thing. so please if any one have any idea about this then let me know please suggest me .thank you .

[karunakar]

How a projection keyboard generally works:

1. A laser or beamer projects visible virtual keyboard onto level surface
2. A sensor or camera in the projector picks up finger movements[3]
3. detected co-ordinates determine actions or characters to be generated

Some devices use a second (invisible infrared) beam:

1. An invisible infrared beam is projected above the virtual keyboard
2. Finger makes keystroke on virtual keyboard. This breaks infrared beam and infrared light is reflected back to projector
3. Reflected infrared beam passes through infrared filter to camera
4. Camera photographs angle of incoming infrared light
5. Sensor chip determines where infrared beam was broken
6. detected co-ordinates determine actions or characters to be generated

[Fabian]

hi try this tread
Microsoft Wireless Laser Keyboard 6000v2.0

[Kirtikumar]

read here ..
http://en.wikipedia.org/wiki/Projection_keyboard