Old 02-03-2014, 11:44 PM #1
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Default help please

how far will a 50mw green laser go? and how far does the beam usually go? thanks


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Old 02-04-2014, 09:19 AM #2
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Default Re: help please

up to 10miles or so i would say.

or lol this video shows 13 miles a 50mw.. crazy http://www.youtube.com/watch?v=mFxe2AgMuOM
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Old 02-04-2014, 09:37 AM #3
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Default Re: help please

A 50mW 532nm's beam will be visible for around 15-20 miles.

-Alex
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Old 02-04-2014, 12:11 PM #4
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Default Re: help please

Quote:
Originally Posted by Tha Greenlander View Post
A 50mW 532nm's beam will be visible for around 15-20 miles.

-Alex
Why not more or less?
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Old 02-04-2014, 12:15 PM #5
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Default Re: help please

Quote:
Originally Posted by DJNY View Post
Why not more or less?
I dunno. I don't make the rules about how far lasers beams are visible in Earth's atmosphere
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Old 02-04-2014, 12:41 PM #6
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Default Re: help please

under maybe perfect weather conditions even more, that also affects but no matter what weather its still quite long even those 50mw only or so.
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Old 02-04-2014, 12:50 PM #7
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Default Re: help please

Quote:
Originally Posted by mortuus View Post
under maybe perfect weather conditions even more, that also affects but no matter what weather its still quite long even those 50mw only or so.
Yes of course, the 15-20 miles range is just an estimate. If a 50mW 532nm laser were to be used under *perfect* conditions it most likely would reach 25 miles, if not more!

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Old 02-04-2014, 01:00 PM #8
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Default Re: help please

Quote:
Originally Posted by Tha Greenlander View Post
I dunno. I don't make the rules about how far lasers beams are visible in Earth's atmosphere
That´s why I put your values in question


You still haven´t seen through why you did get all these neg-reps



@joey502, here I tried to explain why there is no answer to that question

Also, use concrete thread titels. Yours is totally useless.
+ use the forum search to avoid more or less redundant threads.
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Old 02-04-2014, 01:07 PM #9
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Default Re: help please

Quote:
Originally Posted by DJNY View Post
That´s why I put your values in question


You still haven´t seen through why you did get all these neg-reps
I made a goal for myself that started Feb 3rd that I would only post if I knew exactly what I was talking about. I decided it was time that quality is better than quantity in my posts and so far I have been doing alright! I will/have been trying my best to keep it up
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Old 02-04-2014, 01:21 PM #10
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Default Re: help please

Quote:
Originally Posted by Tha Greenlander View Post
I made a goal for myself that started Feb 3rd that I would only post if I knew exactly what I was talking about. I decided it was time that quality is better than quantity in my posts (...)! I will/(...) trying my best to keep it up
Time will tell
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445nm >> Kryton Smooth by lazeerer peak@2075mW
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515nm >> Skylasers HL peak@41mW
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594nm >> Laserglow Rigel peak@4mW
635nm >> MXDL by DTR peak@38mW
642nm >> Saillaser peak@23mW
660nm >> CR2 by lazeerer peak@524mW
685nm >> MXDL by lazereer peak@42mW

Above lasers measured with an Ophir nospin LPM


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Old 02-07-2014, 11:56 AM #11
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Default Re: help please

By laser itself, practically it goes very long way, until it loses energy gradually but visibility is usually ten mile as lower atmosphere has enough junks or water vapor to allow the laser to be seen. It would look like it's cut off but it's not - you may be surprised when you light up a portion of the cloud with it (just don't point at the planes). I have done that with my green diode laser, I was surprised (it has surprisingly low divergence).
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Old 02-11-2014, 11:50 PM #12
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Default Re: help please

thanks guys. the reason i ask is because it looks like it just cuts off. at night if i point it up in the sky it looks as if it goes 500ft then just stops.
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Old 02-12-2014, 04:51 AM #13
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Default Re: help please

Here's a decent article you can read that will give you a general explanation of the phenomenon You describe. Laser Pointer Safety - Why laser beams outdoors seem to end

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Old 02-12-2014, 09:26 AM #14
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Default Re: help please

Quote:
Originally Posted by joey502 View Post
thanks guys. the reason i ask is because it looks like it just cuts off. at night if i point it up in the sky it looks as if it goes 500ft then just stops.
Thats because the human eye no longer has any reference to the distance and beam after a certain point, so the beam goes way longer then you can ever imagine, even those cheap 5mw only... thats the mistake people or most do that point those in the sky and even hit pilots without knowing how much damage they can cause.
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