Sensitivity to colors is a very individual thing ..... some peoples cannot see 780nm clearly, someone can see it as dim red, some others can see also more (i can see 808nm as dim red, also from low power diodes, but cannot see 980nm camera illuminators, and 780nm for me is normal dark red) ..... anyway, this sight sensitivity have absolutely nothing to do with damage thresholds, a 50mW IR laser straight in an eye is dangerous if you can't see it as same as if you can see it ..... for the same principle, a low power scattered beam can be not dangerous also if you see it clearly .....
About kinect, i was perplexed too, at the start, when i've seen the laser detection system ..... pointing IR lasers in face to the players ? ..... but then, doing some researches, i've seen that they was not completely idiots
p)
I worked in 3D graphics in the past, so i know that some beams are not enough for track a 3D object fast and accurate, especially if moving ..... you need thousands of them, and for the more professional applications, also polarization and a second camera (and kinect is not a pro tool
), so i checked for
tech specs (a lot more infos in the related links in the page ..... kinect seem a lot hacked for some funny projects, from the open source community ..... finally a microsoft product that can be useful for something other than steal money from users, perhaps
:crackup
..... it spread an irregular pattern of some thousand of beams for approx 57 degrees vertically, and approx 43 degrees horizontally ..... at close distance from the emitter, this can be dangerous, but at a pair of meters (the capture max range is 3,5 meters), the beams can hit the eyes only one each time ..... the laser is an 830nm one (not 780nm), and
here is an image of the pattern ..... also if the laser is a 60mW one, with all this division, each beam must be safe enough, especially considering that you usually don't stand immobile in front of the sensor, staring at the same beam for all the time (right ?
) .....
The eye disturbs can be caused from a lot of causes ..... psychosomatic, but also specific sensitivity to "flashes" (you don't see them with bare eyes, but each time a beam hit your retina, there is a small "flashing overload",
this camera image , from around 1 minute, can show you better this than my words), or from the game scanning images frequencies (some peoples can have small epilectic crisis just from flashing lights, so some others can just get headache or eye fastidious sensations from them), and so on .....
Now ..... who's the first one that hack it for join it to a computer-controlled laser projector, making a "laser-follower" realtime tracking system show for parties ? ..... :eg: :eg: :eg:
