24,075 views 10 comments

Laser Light Plane Multitouch Technique

In LLP, infrared light from single or multiple lasers shine just above the surface. The laser plane of light is about 1mm thick and positioned as close to the touch surface as possible. When a finger or object hits the light plane, the object lights up and  is seen by an infrared camera below the surface. An image is displayed by using a projector connected to a computer pointed towards the projection material.


Parts List

  • Clear, Flat Surface (Glass, Acrylic, Polycarbonate, Plexiglass, etc.)
  • Infrared Laser(s) – Lasers can be placed in each corner of the surface
  • Line Generating Lens – Creates a thin light plane
  • Projection Material (Rosco Grey, Vellum, Mylar, Paper, other, etc.) – For displaying an image
  • Infrared Camera/Modified Webcam

Video Examples




Did you enjoy this post?

Comment Below , Follow Me on Twitter , Follow Me on Facebook , or Network with Me on Linkedin