Several touch technologies and the IR wavelength of Kinect

1. Depression of full inner reflection, fig, frustrated total internal reflection

2. Scattered Light, Di, diffused illumination,
There is a distinction between the back and the front. Microsoft's surface uses the back, rear-Di

3. Laser plane LLP, laser light plane

4. Scattered Light Plane DSI, diffuse surface illumination

5. Light Emitting Diode flat led-LP, light-emitting diode light plane

 

Secondary infrared light with a wavelength of 780 ~ 940nm, infrared in this range can be read by most cam.

The lower the wavelength, the higher the sensitivity.

 

The Kinect IR projector uses an infrared filter with a wavelength of 830nm and IR cam transmits an infrared filter up to 950nm.

The wavelength of the Kinect IR projector is fixed.

There is a paral component Peltier element between the aluminum plate and the IR projector in the Kinect hardware structure to maintain a constant temperature to prevent wavelength changes.

* Google cadet or wiki Kinect hardware.