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Raptor
25mW Classic Wicked Laser
Joined: 29 Sep 2005
Posts: 30
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 Posted: 10/08/05, 11:18 PM Post subject: If I shine |
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| Would I burn a hole through the earth and blind someone in china? |
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chargerman
Wicked Lasers God
Joined: 08 Sep 2005
Posts: 1737
Movie(s): 2
Location: Big Horn Mountains, Wyoming
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Raptor
25mW Classic Wicked Laser
Joined: 29 Sep 2005
Posts: 30
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| Posted: 10/08/05, 11:43 PM Post subject: Re: RE: t |
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| chargerman wrote: |
Did you eat a lot of paint chips when you were a kid?  |
have you ever had a sense of humor? |
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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, 4:49 AM Post subject: |
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Chargerman: You and I think way too much alike. (ROTFLMAO!)
Raptor: Don't use optics with Class 3B lasers unless you're in a lab environment, know the likely result of your actions and are wearing your Laser Safety Glasses. Don't use Class 3B lasers with fiber optics either. Very bad idea.
_________________
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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AuroraAlpha
Wicked Lasers Master
Joined: 07 Oct 2005
Posts: 763
Picture(s): 55
Movie(s): 4
Location: North Chicago
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| Posted: 10/09/05, 9:05 AM Post subject: |
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Can you explain why its a bad idea? I am intressed to know since I might soon be having one from nexus.  |
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chargerman
Wicked Lasers God
Joined: 08 Sep 2005
Posts: 1737
Movie(s): 2
Location: Big Horn Mountains, Wyoming
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| Posted: 10/09/05, 10:33 AM Post subject: Optics |
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Raptor: I was joking with you, It's apperent you are very excited to get your new "Toy", and I have a great sense of humor, thats why I answered your post the way I did! 
That said...these high powered units from Wicked are anything but "Toys" and like Nero said....the use of optics/fiberoptics greatly increases your chances of BLINDNESS! Anyone using optics of any kind would be a fool to not be wearing laser eyeware of some sort. Furthermore.....an "Accident" causing blindness and then associated with a "Wicked" laser is a great way to ensure that the average joe will have a far more difficult time getting his hands on these types of units! Be responsible Cheers Dale
_________________
Best Regards Chargerman
Great divergence calculator
http://www.pseudonomen.com/lasers/calculators/ |
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AuroraAlpha
Wicked Lasers Master
Joined: 07 Oct 2005
Posts: 763
Picture(s): 55
Movie(s): 4
Location: North Chicago
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| Posted: 10/09/05, 5:06 PM Post subject: |
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| So if you have the eyeware that absorb the laser are you ok to use them? I have seen a lot of fiber optics for lasers, where you unscreaw part and then you can put the optics right in, which is a nice way to move the beam around. |
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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, 10:07 PM Post subject: |
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Fiber Optics are NOT to be used with Class 3B lasers. NEVER. The fiber optical attachment you have seen was designed for use with flashlights in the Maglite series and not for lasers. Because the beam will exit the end of the fiber optic and this can easily be flipped in the direction of the user or someone else by mistake or by accident.
'Class 3B lasers should not be viewed by optical devices'. Those exact words appear on many websites and even packaging for these devices. Pointing one into a set of binoculars for example will focus the beam through the lenses to form a hot spot where a person's retina would be. Same with optical viewfinders on cameras and on magnifying lenses. I have tried this with much lower-powered lasers using heat-detecting chemical plates. There's a hot spot produced roughtly where the retina would be located behind the scope optics. Same thing happens when you point a telescope, sniper scope, magnifying glass scope at the sun: There's a hot spot created. The size of the hot spot is not large enough to cause the heat to spill beyond that area because it's small and concentrated. Excess heat simply dissipates. It's many times stronger than what is requires to turn the back of your eyeballs into something that (visually) closely resembles steak that was cooked on a saucepan on high heat. It takes about 1/1200 of a second to do this with optics. Exactly the same as a magnifying glass and sunlight would do. So use a magnifying glass for such experiments.
_________________
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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AuroraAlpha
Wicked Lasers Master
Joined: 07 Oct 2005
Posts: 763
Picture(s): 55
Movie(s): 4
Location: North Chicago
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| Posted: 10/10/05, 8:20 AM Post subject: |
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I'm sorry but you are kinda giving comfliting stuff. First you said the goggles would protect you from almost anything (other then shoving it to the goggles and holding it on there.
Now you are saying that if you have on a fiber line, it will blind you with the goggles (in a rather painful, and eyeball with blood filling way).
So which is it? |
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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, 11:44 AM Post subject: |
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AuroraAlpha:
Fiber optics will point your laser in directions you cannot easily control. As I have stated before, the safety goggles are to protect your eyes from accidental reflections or 'specular reflections'. They may protect you from a direct laser shot to the eye if you were to do so by mistake but I have seen that the laser light will still penetrate the glasses if fired at point blank without reflections. I cannot determine how much of the beam is filtered down. The same thing will happen with a fiber optic... it will allow the laser to penetrate the glasses up close or at arm's length. There may be sufficient protection but that's not the express function and purpose of the safety glasses. Sure they filter 532nm lightwaves but there's some IR light and still enough 532nm light waves to pass through. Fiber optics are suitable for communication by pulsed laser light. They may also assist in certain types of surgery. But there is a lot of safeguard issues that are addressed in such projects. Those safeguards are not in place when experimenting or using portable lasers that are not fixed to a surface. For this reason, you should never use fiber optics with a Class 3B or a Class 4 laser. Even at arm's length there's a significant risk with fiber optics. I work with smaller lasers from Wicked and larger commercial lasers of various wavelengths from time to time and even I wouldn't play with fiber optics on a laser head. A handheld laser is easily controlled. The tight buttons on the Wicked models ensure that they are not accidentally turned on without deliberate effort being required. Adding a flexible fiber optic element to a laser is going to add a degree of unpredictability to the device. You can't harm people very much with a BB gun at a distance. The pellets loose their ability to cause harm as they slow down over many feet. But....Would you point a loaded BB gun to your eye? Same here with the fiber optics.
There is no pain whatsoever when you blind yourself with a laser. There are no pain-receptor nerves at the back of the eyeball. The blood vessels may continue to leak into the eyeball continually for several days or there may be a popping sound followed by immediate loss of eyesight as your retina ruptures. You will probably go into shock like most other laser accident victims. Your retina will turn grey from the cooked tissue. Your vision may simply have a gigantic black pot that occupies 96% of of your vision. Or you may see the world as through a full glass of iced tea, complete with total aspherical distortion and flakes of cauterised tissue and blood. Note that as you read this text, your vision can only pick out the words a few at a time. That is because the area of the retina that details the information your eyes take in is actually very small. So even a small amount of damage to the retina is potentially very serious. The width of a laser at arm's length is quite narrow. And the lens of the eye concentrates the beam to the tiny spot at the back of your eyes where detailed vision is processed.
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My science teacher at highschool noticed my interest in the large laser we had in a locked storage cupboard. He told us about the wonders of lasers and how interesting they were to work with. But after class I asked him if a laser like that could be harmful. Now this laser was a little stronger than the Wicked lasers but was still a Class 3B. He then told me about another science teacher who fired up his laser but did not block the windows in the lab correctly. Several miles away, a man who was working at home simply went blind as a result of the laser. This is an extreme example but it details a very good reason why you want to be in complete control of where your beam goes. Granted, a flexible fiber is likely to diffuse the beam somewhat and it may not be a problem to anyone beyond a few feet. Laser light is coherent light. This means it's light waves travel in a straight direction and are not scattered.
_________________
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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Athoul
Wicked Lasers God
Joined: 13 Sep 2005
Posts: 7544
Location: Canada
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| Posted: 10/10/05, 3:40 PM Post subject: |
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Basically it's very risky!
If you want to experiment with fiber optics on a portable laser, then use it on a <5mW model. Don't play dice with your eyes! Treat the emitting end of the fiber optic as though it is the actual laser emitter. It's very easy to underestimate the power of these lasers due to their size, but 70/80/90mW is getting into some serious power outputs.
cheers, |
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Davidgojr
Wicked Lasers Master
Joined: 13 Oct 2005
Posts: 768
Location: USA
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| Posted: 10/13/05, 3:38 PM Post subject: |
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| Be aware that lenses can be used to focus an already intense beam of laser light further. (More energy per unit area) Needless to say, this is an extremely hazardous practice that could cause a wide variety of injuries. Just as a magnifying glass can focus the rays of the sun to create a small ultra-bright area of heating, the same is true of an already powerful laser. For safety purposes, do not attempt anything like this without being in a carefully controlled laboratory environment. |
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kushy04
Fusion Laser
Joined: 10 Oct 2005
Posts: 355
Picture(s): 1
Location: Clarks Summit, PA
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| Posted: 10/13/05, 6:00 PM Post subject: |
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wouldnt the magnifying glass concentrate the beam even fuirther for only ONE spot? when you sya it concentrates the beam further... it makes one think of this...
OOiiiOOOOOOOOOOOiiiiiiii| |
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OOOOOOooooOOOOiiiiiiii| |__________________________
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OOOOOOOOOOOOOiiiiiiii| |
OOiiiOOOOOOOOOOOiiiiiiii| |
when in actuallity it would do something more like this?
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