Optical (Camera) Sensor Materials Glass substrate, line scanning optical sensors, lighting strips Principle of Operation.

• Miniature cameras are positioned in the top two corners of the substrate.
• Illuminated border or reflective borders on the opposing three sides project a uniform field of infrared light slightly above the glass surface.
• Touch occurs when a finger or object block the light from the cameras.
• The controller processes the optical information and calculates the X,Y coordinates.