I work on communication lasers that are high end. If you could see the light even that is impossible for the human eye. It does pulse much like the effect of this video displays but at the nanosecond level. We have sensors that have to see each pulse and check each frame. Essentially, the laser turns on/off if you could see it.<br><br>I generally work with forms of 16 QAM modulation for the C and E bands at 800Gig waves or less. We have lasers that will burn a hole through you if you stood there long enough using a form of RAMAN amplification.<br><br>I always wondered how this effect was done. I suspected a mirror or prism was used to get the "beam" in to the shot.,(reply>), The lasers you work with a probably not bright enough in the visible spectrum for human eye to see, a decently powerful laser pen can be visible to the naked eye in a room without any direct sunlight