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Old 05-15-2012, 05:26 AM   #1
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Default Lasers in the bright sunlight

Hello,

I am new to lasers and was wanting to know if there is a laser that will be able to be displayed in bright sunlight no more than like 9 feet away? Are there lasers that are safe to human eyes that will be able to do this? Also what color is easiest to see?

Thanks,

Stephen
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Old 05-18-2012, 06:35 PM   #2
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Default Re: Lasers in the bright sunlight

If you mean the dot any 5mW green laser will work and it's quite safe.
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Old 05-18-2012, 06:36 PM   #3
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Default Re: Lasers in the bright sunlight

What Atomixcrox said is right.

However if you're talking about the BEAM, then you're going to need a 1+ watt green laser to see any sort of beam in broad daylight. Fog or mist would help bring it out even further too.
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Old 05-18-2012, 08:27 PM   #4
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Default Re: Lasers in the bright sunlight

I see this is laser vs sunlight week at LPF :P
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Old 05-18-2012, 08:47 PM   #5
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Default Re: Lasers in the bright sunlight

The dot of even a 1mW green is visible in the daytime 9 feet away. How easy it is to see depends on the amount of ambient light.

To see a beam, noon daytime, if the air is clear... forget about it, you'll need watts and watts of power, and it will not be anywhere near safe.

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I see this is laser vs sunlight week at LPF :P
Lol! Yes the laser vs balloon thing got old I guess
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Old 05-18-2012, 08:57 PM   #6
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Default Re: Lasers in the bright sunlight

I've managed to see the beam of "the green box" in my sig in sunlight once (10am on a reasonably sunny day). It could only be seen from an almost parallel angle, pointing at a black surface. The air here is very polluted so it might be hard to reproduce.
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Old 05-18-2012, 09:00 PM   #7
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Default Re: Lasers in the bright sunlight

I can faintly see the beam of my 1W 445 in broad daylight.
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Old 05-18-2012, 10:10 PM   #8
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Default Re: Lasers in the bright sunlight

You in a desert? the dust may do that, but for me at noon I have never seen a laser I can point in the sky at noon and "see" it. a 1w to2w 445 would totally blend in with all the other scattered blue light, but some folks have better vision than others.
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Old 05-18-2012, 10:18 PM   #9
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Default Re: Lasers in the bright sunlight

Not sure about bloompyle but as for me I don't live in no desert. But this city is so damn polluted that if I leave something sitting unmoved on my desk for a week and wipe it with cloth the cloth gets grey. Yeah, it sucks.

I pointed mine at a black surface outside, during a sunny day. The black surface surely helps with the contrast. Never seen a beam pointed at a sunny sky either.
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462nm 501B by Atomic (1970mW pk)
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520nm MXDL pen by DTR (31.6mW pk|28.8mW avg)
532nm: NewWish from DX (28.6mW pk|26.8mW avg|10mW rtd) | 532nm Classic from DX (120.0mW pk|103.1mW avg|100mW rtd) | 532nm "The Green Box" by Atomic (176.7mW pk|140.0mW avg)
635nm NewWish from O-Like (4.6mW avg|5mW rtd)
638nm Classic from Lazerer (409.3mW pk|389.4mW avg|415mW rtd)
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780nm module from Ebay (2.7mW avg|5mW rtd)
808nm Classic - modded from a FocalPrice 532nm by Atomic (x|>200mW est)
980nm NewWish from Ebay (81mW pk|5mW rtd) | 2nd line around 490nm

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Old 05-18-2012, 10:30 PM   #10
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Default Re: Lasers in the bright sunlight

I can see the beam if I have something to contrast like the lawn, or black asphalt. Shining it to the sky? No dice. Also, no desert, I live in Colorado.
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Last edited by bloompyle; 05-18-2012 at 10:31 PM.
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Old 05-19-2012, 05:58 AM   #11
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Default Re: Lasers in the bright sunlight

The deserts have considerably less particles in the air than any other place in the world. There is less water vapor, less plant, and organic material, and sand is very heavy. So beside a sand storm, you will not get as strong a beam than cities, forests, mountains, ect.
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Old 05-19-2012, 06:20 AM   #12
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Default Re: Lasers in the bright sunlight

Dust is what I had in mind, the lighter dust is just floating in the air at all times in some deserts, they are more dust bowls than sand dunes, in certain areas.
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Old 05-19-2012, 07:15 AM   #13
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Default Re: Lasers in the bright sunlight

It was a general statement.
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Old 05-19-2012, 07:25 AM   #14
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Default Re: Lasers in the bright sunlight

Quote:
Originally Posted by Tech_Junkie View Post
The deserts have considerably less particles in the air than any other place in the world. There is less water vapor, less plant, and organic material, and sand is very heavy. So beside a sand storm, you will not get as strong a beam than cities, forests, mountains, ect.
Would be interesting to get various members from different types of areas
like city to desert as you mentioned, and have them take videos in macro
of the beams outdoors..

The air quality in a big city through winter is not nearly as bad as summer
mixed in with pollen and the like. You can see the difference when shooting beams
in the night sky.

I never thought to pay attention to that when pics or video is posted
given the location of the poster..
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Old 05-19-2012, 08:03 AM   #15
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Default Re: Lasers in the bright sunlight

We did have a few members a while back ask why they had issues seeing the beam at night, and it was because they lived in an arid environment.

I think thats a great idea, but a tall order. You have camera, laser, and environmental variables. It would be hard to get definitive stats.

I'm blown away by the amount of particles flowing through my house at any given time. Its hard to imaging breathing it in day and night.
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Old 05-19-2012, 08:09 AM   #16
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Default Re: Lasers in the bright sunlight

Quote:
Originally Posted by Tech_Junkie View Post
I'm blown away by the amount of particles flowing through my house at any given time. Its hard to imaging breathing it in day and night.
I know eh?

One thing weird I have noticed around here is that within the last two weeks on really clear nights there are far more particles in the air then just a few weeks ago...

It's not foggy, humid or anything and I can see the stars clearly as well. It's just strange how many more floaties there are in the air now then earlier this month...

Seems like there's even more then before and especially strange since my buddy came over and was talking chem trails that he believes he has been seeing in the sky...

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