Microsoft's new lens tracks your face, steers 3D images to your eyes (video)
![](https://s.yimg.com/ny/api/res/1.2/9rH3F9DtNbJb_PqmGTjmrA--/YXBwaWQ9aGlnaGxhbmRlcjt3PTcwNTtoPTM4Nw--/https://s.yimg.com/uu/api/res/1.2/8ovz1n2hbT2hCfauP.fZmg--~B/aD0yMTg7dz0zOTc7YXBwaWQ9eXRhY2h5b24-/https://www.blogcdn.com/www.engadget.com/media/2010/06/6-13-10-steerablelcd-1276471656.jpg)
Glasses-free 3D has taken several forms, but most have a critical flaw -- viewers have to stand in predefined locations to get the effect. That just won't do, so Microsoft's prototyped a new approach, and it's one of the wildest we've seen. Taking a cue from Project N... we mean Kinect, cameras track the face while a special wedge-shaped lens traps bouncing light, and after the beams have reached a "critical angle," it exits towards the viewers eyes, aimed by programmable LEDs at the bottom of the screen. Since the system can beam a pair of simultaneous images to two different places, the obvious use is stereoscopic 3D, but researchers found they could also send different images to different viewers, as a sort of privacy screen. If that sounds far fetched, you're not alone -- but you'll find a video proof-of-concept at the more coverage link.