Old 10-19-2013, 12:17 PM #1
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Question Blue laser dot

Hello guys,

I wanted to ask, how safe is it to look without safety goggles at the dot reflected outside on a wall from a 1.4W blue laser (445nm) at around 15m (49ft) distance?

Thanks.


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Old 10-19-2013, 12:44 PM #2
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Default Re: Blue laser dot

Quote:
Originally Posted by Joshuan View Post
Hello guys,

I wanted to ask, how safe is it to look without safety goggles at the dot reflected outside on a wall from a 1.4W blue laser (445nm) at around 15m (49ft) distance?

Thanks.
Hey Joshuan!

I say it is pretty safe, as long as this surface isn't: Reflective,White or Semi-Reflective.

But anywhere closer and I would wear goggles, you only have 1 pair of eyes
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Old 10-19-2013, 01:03 PM #3
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Default Re: Blue laser dot

As long as said wall isn't a mirror, you're fine.
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Old 10-19-2013, 01:22 PM #4
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Default Re: Blue laser dot

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Originally Posted by Things View Post
As long as said wall isn't a mirror, you're fine.
Even if it's a standard white wall?
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Old 10-19-2013, 01:28 PM #5
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Default Re: Blue laser dot

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Originally Posted by Joshuan View Post
Even if it's a standard white wall?
Yep,

White reflect lights and spreads it out, if anything looking at a black wall is worse.
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Old 10-19-2013, 03:37 PM #6
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Default Re: Blue laser dot

That distance should be fine, but no matter what, it is a good idea to invest in some safety glasses. I bought a pair off a member here for 14$ that work wonderfully...i got them after reading the post on here about the member who had the beam of his laser just flash across his eye, and it left a big dot in the middle of his eye...which doesn't ever fully go away.


P.S. cool profile pic, you take that yourself?
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Old 10-19-2013, 03:43 PM #7
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Default Re: Blue laser dot

Quote:
Originally Posted by Tha Greenlander View Post
...if anything looking at a black wall is worse.
Heh?

Black will absorb a good portion of the light on top of spreading it out. It's the material that spreads out the light... plus, in simpler terms, it's brighter on a white wall, and dimmer on a black wall. Which one is reflecting more light?

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Old 10-19-2013, 06:05 PM #8
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Default Re: Blue laser dot

Quote:
Originally Posted by crazyspaz View Post
That distance should be fine, but no matter what, it is a good idea to invest in some safety glasses. I bought a pair off a member here for 14$ that work wonderfully...i got them after reading the post on here about the member who had the beam of his laser just flash across his eye, and it left a big dot in the middle of his eye...which doesn't ever fully go away.
I already have safety goggles and they protect well, the issue is that sometimes we're using the lasers to have fun and goggles make the laser light invisible, so that quite takes the fun out of playing with the lasers in our collections.
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Old 10-19-2013, 06:06 PM #9
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Default Re: Blue laser dot

Quote:
Originally Posted by crazyspaz View Post
P.S. cool profile pic, you take that yourself?
Oh thanks but no, I wasn't the one taking this one although I have a few that are similar.
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Old 10-19-2013, 06:10 PM #10
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Default Re: Blue laser dot

I was thinking the same thing about the black wall comment. From his original statement that a white wall reflects the light, he couldn't have meant that about the black wall. Must have been a mistake. A black wall would be ideal if you were worried about reflected light. You can tell when shining your lasers from a light surface to a dark. The brightness is greatly effected.
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