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Old 04-02-2012, 11:32 PM #1
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Default 200mw laser safety

Is it safe to stare at a 200mw 405nm laser dot above 10 feet without safety goggles? I won't be burning stuff with it and also, will an unfiltered IR from green lasers show up in night vision goggles?

-One last thing, what are the side effects of eye damage from IR. Just curious.


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Old 04-03-2012, 12:21 AM #2
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Default Re: 200mw laser safety

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Originally Posted by Sevensixtwoby39 View Post
Is it safe to stare at a 200mw 405nm laser dot above 10 feet without safety goggles? I won't be burning stuff with it and also, will an unfiltered IR from green lasers show up in night vision goggles?

-One last thing, what are the side effects of eye damage from IR. Just curious.
1.no
2.all I know is it will show up on unIRfiltered cameras you can test this with the tv remotes IR LED.
3.not sure but most likely loss of vision.

Last edited by lman; 04-03-2012 at 12:22 AM.
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Old 04-03-2012, 01:31 AM #3
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Default Re: 200mw laser safety

Hit in eye with 1000mw 445nm blue laser
having ir damage is the same as any other laser damage you just wont see it
You need goggles, Point final
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Last edited by AnthoT; 04-03-2012 at 01:33 AM.
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Old 04-03-2012, 02:33 AM #4
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Default Re: 200mw laser safety

So it's not safe to stare at a 200mw purple laser dot at over 10 feet pointed at non-reflective surfaces? I know I need goggles but I'm still waiting for the shipping.
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Old 04-03-2012, 02:35 AM #5
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Default Re: 200mw laser safety

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Originally Posted by Sevensixtwoby39 View Post
So it's not safe to stare at a 200mw purple laser dot at over 10 feet pointed at non-reflective surfaces? I know I need goggles but I'm still waiting for the shipping.
I wouldn't risk it. But it's your eyes.... Anything can happen it's just an accident waiting to happen because 200mw of 405nm seems somewhat dim it's actually quite bright.

Here is the link again Hit in eye with 1000mw 445nm blue laser
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Old 04-03-2012, 04:20 AM #6
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Default Re: 200mw laser safety

Ok thanks. But really though I should re-state my question in a specific manner.


Does the 200mw purple laser itself "cause damage to the eye itself" whilst looking at the dot for ever 10 feet pointed at a dark object. I know it's risky that something might reflect it back but does it actually cause damage. Well to be honest it's way more than 10 feet. Maybe 20 or more yards.
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Old 04-03-2012, 06:33 AM #7
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Default Re: 200mw laser safety

Class 3B
LASER RADIATION
AVOID EXPOSURE TO BEAM
CLASS 3B LASER PRODUCT (my 200mw purple laser is a class 3b)

A Class 3B laser is hazardous if the eye is exposed directly, but diffuse reflections such as those from paper or other matte surfaces are not harmful. The AEL for continuous lasers in the wavelength range from 315 nm to far infrared is 0.5 W. For pulsed lasers between 400 and 700 nm, the AEL is 30 mW. Other limits apply to other wavelengths and to ultrashort pulsed lasers. Protective eyewear is typically required where direct viewing of a class 3B laser beam may occur. Class-3B lasers must be equipped with a key switch and a safety interlock. -Wikipedia

I do understand that It's not worth the risk. I'm going to wait until I get my goggles before having more interaction with my new laser.
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Old 04-03-2012, 07:58 AM #8
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Default Re: 200mw laser safety

Take a look at this.

Hope I helped!
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Old 04-04-2012, 12:36 AM #9
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Default Re: 200mw laser safety

It'll probably be okay if the dot is reflecting off a non-specular surface. What you should do, however, is shine it on some bleached white paper so that you can see how bright it actually is when it causes fluorescence, not just the 405nm wavelength light your eyes aren't sensitive to and won't interpret as being "bright."
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Old 04-04-2012, 04:27 AM #10
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Default Re: 200mw laser safety

Ok thanks to you all =)
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