14369RE: [SeattleRobotics] Re: Laser Diodes from Laser Printers?
- Aug 1, 2003It's pretty hard for IR light to make it through the water filling the eyeball
to reach the retina. Laser damage to the retina is more likely to be caused by
visible lasers, especially when the eye is focused to infinity. That's when the
collimated laser light is brought to the smallest point on the retina. The main
danger from IR light is to the cornea and that's minimal at these levels.
These warnings are for lawyers. This doesn't mean you should be staring into
laser diodes intentionally, but the "danger" is much overstated in our litigious
Yeah, I've got a recommendation. Have you seen
those labels inside the printers, the ones
that say something to the effect of "Warning:
invisible laser radiation, avoid exposure to beam" ?
Nothing personal, but only an idiot would
consider using those laser diodes in a way
where other people could unknowingly get their
retinas fused. Most, if not all, robotics
applications fall into that category.
Besides the fact that it's dumb, using the
lasers in this manner can be illegal (especially
if you also drive excess current through them to
increase the power).
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