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Raptor
25mW Classic Wicked Laser
Joined: 29 Sep 2005
Posts: 30
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 Posted: 10/07/05, 11:09 PM Post subject: 90mw laser |
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I asked someone and he told me he shined his 90mw laser at his white garage (not glossy) from about 15 feet and his eyes were sore for about 20 minutes...
Is it really that strong that if I shine it on non-reflective surfices such as my ceiling, I will hurt my eyes?
I already ordered, so does anyone have any tips for laser safety (assuming im not buying goggles) Such as things I should and should not shine it at.. ETC. |
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Mad_Demon
25mW Classic Wicked Laser
Joined: 20 Sep 2005
Posts: 31
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| Posted: 10/08/05, 3:39 AM Post subject: |
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Pointing the laser at a non glossy white surface and looking at the dot is damaging. A white surface will not reflect in a "mirror"-like way, it will reflect the beam in a diffuse way. Take a low-power laserpointer or an LED and point it at a white piece of paper. You will see it will reflect the light.
Now, put this to the scale of a 90mW laser. If you look at the point of the beam that is bouncing of a white surface (or any surface for that) it can be dangerous. |
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Nexus
Wicked Lasers Master
Joined: 02 Jun 2005
Posts: 756
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| Posted: 10/08/05, 3:42 AM Post subject: |
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You should not point it at areas where you'll be able to see the dot hit, for example your ceiling, your wall, or your garage, unless you are buying goggles.
Best Regards |
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Raptor
25mW Classic Wicked Laser
Joined: 29 Sep 2005
Posts: 30
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| Posted: 10/08/05, 1:28 PM Post subject: |
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| Nexus wrote: |
You should not point it at areas where you'll be able to see the dot hit, for example your ceiling, your wall, or your garage, unless you are buying goggles.
Best Regards |
for just certain colors or every surface??? why would people buy them if you can't even look at where you are shining it?  |
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chargerman
Wicked Lasers God
Joined: 08 Sep 2005
Posts: 1735
Movie(s): 2
Location: Big Horn Mountains, Wyoming
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| Posted: 10/08/05, 2:22 PM Post subject: RE: |
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Basically what Nexus is saying, Raptor....I think....is that if the diffused reflection from ANY surface is even slightly uncomfortable to look at.....don't do it without proper eyeware! Direct reflections go without saying. My Nexus 95mw is so bright that looking at the "Dot" on any surface color.....even black....within 15 to 20 feet is far to bright to stare at! If what your shining your laser at is uncomfortably bright to look at......it's most likely not to good for your eyes. Just use some common sense Raptor, if you ordered a 90mw like your friends, viewing the "dot" up close on ANY surface is a no no. Besides.....most people are fasinated with the VISIBLE BEAM! Cheers Dale
_________________
Best Regards Chargerman
Great divergence calculator 
http://www.pseudonomen.com/lasers/calculators/ |
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Raptor
25mW Classic Wicked Laser
Joined: 29 Sep 2005
Posts: 30
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| Posted: 10/08/05, 3:42 PM Post subject: |
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So how do you guys light matches, pop baloons, and cut black tape with them? do you just look away?
Also, does this count out my hopes of frying small spiders and ants with it, because I will need to look away so I can't see where im shining it? |
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chargerman
Wicked Lasers God
Joined: 08 Sep 2005
Posts: 1735
Movie(s): 2
Location: Big Horn Mountains, Wyoming
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| Posted: 10/08/05, 5:45 PM Post subject: RE: |
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That's why you will need some laser eyeware! If you are going to get into experimenting with your laser you really need eye protection. For starpointing or just general goofy around your O.K. without them, but for up close.....get some laser glass'/goggles. Cheers Dale
_________________
Best Regards Chargerman
Great divergence calculator
http://www.pseudonomen.com/lasers/calculators/ |
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nero_design
Wicked Lasers God
Joined: 02 Sep 2005
Posts: 1463
Picture(s): 98
Movie(s): 1
Location: Australia
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| Posted: 10/09/05, 5:54 AM Post subject: |
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I find that pointing the NEXUS at a match head can be almost painful to look at without the glasses and I always use them now for doing these kind of experiements. There's a bit of flash-blindness (the kind of after image you get from looking into a camera flash) when the beam hits the surface of the match but this effect is completely cancelled when using the glasses. You can still see the dot and sometimes the beam if there's any smoke in the room.
See image: http://www.pbase.com/nero_design/image/49116365
_________________
Regards,
Marco Nero
* Laser Gallery: http://www.pbase.com/nero_design/pro1wickedlasers
* Always use appropriate laser-safe eyewear when using higher powered lasers. |
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fr0ng
25mW Classic Wicked Laser
Joined: 13 Sep 2005
Posts: 30
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| Posted: 10/12/05, 4:01 PM Post subject: |
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| white reflects light/heat and black absorbs it...so shining it on a black object will make the dot appear dimmer and it wont hurt your eyes as much as it would if you shined it on something white..but like nexus said, buy goggles if youre going to be doing that...your eyesight is very valueable and you dont want to ruin it for the rest of your life over something that was completley avoidable. |
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