A couple of years ago i watched a television show about how you can put a light beam into a prism and split the beam into two separate beams and if a mirror is placed in front of one of the beams the other will bend as if there was a mirror in front of it, a couple of years prier to that i watched a television show
on how to mix two different colored beams, but invisible to the nacked eye, to get a visible dot. i then designed a device that uses the two technologies to make a 3d television.