Infra red projector - depth detector

Infra red projector
https://www.youtube.com/watch?v=brnIty7mh2Q

https://www.youtube.com/watch?v=dTKlNGSH9Po

How the Kinect Depth Sensor Works in 2 Minutes
https://www.youtube.com/watch?v=uq9SEJxZiUg

http://electronics.stackexchange.com/questions/125614/high-quality-ir-projector-for-depth-detection

https://www.youtube.com/watch?v=XzW-FZ8TBzE

https://www.youtube.com/watch?v=CIkscN6nXcE

What's inside xbox one's kinect sensor
https://www.youtube.com/watch?v=-RELJD0LBg8

SHARP IR Distance DEMO: GP2Y0A710K0F
https://www.youtube.com/watch?v=l8kjBSBZMp4