10 ms·
> Stray reflections can easily blind. To emphasize this point, since we're talking about a 450nm laser at either 500mW (maybe just barely low enough to hypothe
by pdkl95 9y ago
> Stray reflections can easily blind.
To emphasize this point, since we're talking about a 450nm laser at either 500mW (maybe just barely low enough to hypothetically qualify as Class 3B?) or 800mW (probably Class 4?), any stray reflections could easily cause blindness before the eye can respond by blinking.
Any laser powerful enough to burn or cut is a "why did my eye make a popping sound"[1], risk, not the "blink oww! that's bright!" that we are familiar with.
[1] the sound is a spot on the retina explosive boiling after the laser heated it extremely rapidly past 100C
- microcolonel 9y agoHere's a video of a public axe throwing contest with amateur participants, no backstop, and people directly behind it. https://youtu.be/EeiMvKuXs0E https://youtu.be/EeiMvKuXs0E People endanger the public at large all the time, knowingly or unknowingly. There is no decent world in which acts which merely pose a danger to the public are illegal before they cause that danger.
- jerf 9y agoPeople instinctively understand the risks of throwing things, even sharp and heavy things. People do not have an instinctive understanding of the risks of lasers. They may both be dangerous, but that does not mean the two levels of danger are the same.