14377Laser Eye Safety
- Aug 1, 2003My last words on this topic...
I urge anyone contemplating using a laser
in a robotics project to first learn about
laser eye safety. A good starting point is
the widely referenced website at:
One of the interesting calculations you will find
there is a comparison of the intensity of light
falling on the retina from staring directly at the
Sun vs. staring directly into a 1mW laser (most
laser pointers are more like 5mW...). Turns out
that the laser can have an intensity on the retina
150 times MORE than the Sun. So if you believe
that staring into the Sun can cause eye damage,
you should have no problem believing that a low power
laser can also damage the eye. And infrared lasers
are worse, because they don't cause you to blink so you
tend to get longer exposures than with visible light.
(Power density is not the only factor determining
when damage occurs, but is is a significant factor).
There is a lot of great information on the web,
including more formal documentation like:
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