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Raptor
25mW Classic Wicked Laser
Joined: 29 Sep 2005
Posts: 30
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 Posted: 10/08/05, 9:08 PM Post subject: How well d |
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How well do these protect you? I am assuming I can look directly at the dot while shining it on a white surface or burning black tape and not be harmed by partial reflections from glass and glossy surfaces, correct? (Im talking about a 90mw laser)
Do these just protect my eyes, or do they make the beam/dot invisable so I can't see it?
And finally, could someone post a couple pics of their goggles? I might even wear these around haaha |
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chargerman
Wicked Lasers God
Joined: 08 Sep 2005
Posts: 1736
Movie(s): 2
Location: Big Horn Mountains, Wyoming
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| Posted: 10/08/05, 10:38 PM Post subject: Goggles |
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Hey Raptor,
What kind of goggles are you talking about? They have to be specifically for 532mn (Green) lasers. Are you talking about the ones they sell here on Wicked? If you are then....yes, they will protect against anything short of actually holding the laser up to your eye to see if it will stop the beam! And also yes....it will attenuate the beam( make it appear weaker) Hope this helps. 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, 5:42 AM Post subject: |
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Here's my two first pairs out of the box:
http://www.pbase.com/nero_design/image/48977772
This is the sort of thing you simply can't do without the goggles:
http://www.pbase.com/nero_design/image/49019807
The beam is being split and reflected back by the diamond.
This could have been the last thing I'd have seen I hadn't been wearing the goggles:
http://www.pbase.com/nero_design/image/49116361
This shot was taken whilst wearing the glasses. I'm lucky to have worn them because the beam bounced straight off the surface and into my left eye. The goggles prevented even a temporary flash-blindness but had I not been wearing them... well, who knows. Sure felt the power of the laser through the glasses, even though it was only a partial specular reflection.
http://www.pbase.com/nero_design/image/49449800
I find that the beams themselves appear fainter through the glasses but the dot simply looses it's annoying overbright corona and the dot is still VERY visible through the goggles. Experiements show that the laser itself can still penetrate the goggles (not sure how much light makes it through but the beam certainly appears on the other side of the lenses). However, the purpose of the goggles is to eliminate much of the risk resulting from secondary specular reflections. I managed to video the reflection from a NEXUS laser cutting through thin plastic two weeks ago. Use the glasses indoors when there's a possibility of the laser reflecting off a specular surface such as a television monitor, chrome fittings, glass windows or picture frames etc. Your watch or a polished ring or even a cookie packet can throw a specualr reflection back at you. Outdoors rarely requires the same degree of caution. All good laserists that have suffered eye damage did so with a fairly low powered laser and when there were safety goggles available yet they chose not to wear them thinking there was nothing of potential risk to worry about. Beware of infrared lasers which cannot be seen yet carry a higher level of risk.
*Class 3A lasers (anything under <5mW) have no likely risk to the eye under most circumstances. As such, they are often the output of choice for laser 'pointers'. They have the potential to be harmful in only certain conditions and circumstances. They usually carry a "Warning!/Caution!" label.
*Class 3B lasers (anything over <5mW) can potentially damage the retina if used up close and even the specular reflections hold the same risk. Partial reflections (specular reflections) from glass and other glossy surfaces are indeed potentially harmful with Class 3B lasers. Reflections from dark matte materials and non-reflective surfaces (diffuse reflections) are generally harmless. They usually carry a "Danger!" label.
*Class 4 lasers (anything over <1,000mW) produce both harmful 'diffuse' and 'specular' reflections. These are also capable of blinding over long distances as well as short. They normally carry a large "Danger!" label.
The use of 532nm safety glasses with 532nm Lasers in the class 3B category is a precautionary measure. To date, there have been no examples of accidents with the higher powered green lasers to my knowledge but in order to maintain this record, it pays to be sensible. There HAVE been accidents with identical output lasers in other colours/wavelengths of the same outputs and these took place in laboratories so the concern is not imaginary.
(Mods, please delete or modify if this subject/material is unsuitable for the forum)
_________________
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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Raptor
25mW Classic Wicked Laser
Joined: 29 Sep 2005
Posts: 30
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| Posted: 10/09/05, 2:11 PM Post subject: |
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How come one pair has an addidas symbol on them and the other doesn't? lol
I hope I get an addidas one. |
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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: 10/10/05, 12:05 AM Post subject: |
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I never even noticed the differences betwee the two. How curious.
_________________
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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