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Old 09-14-2014, 11:06 PM #1
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Default How far does a 1W blue laser go

How far does a blue laser go with standart lens.


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Old 09-14-2014, 11:13 PM #2
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Default Re: How far does a 1W blue laser go

The answer is that it depends. More data needs to be provided to answer the question.
How visible does it need to be on the target object?
How much ambient light is there?
What is the divergence and beam size of your laser?
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Old 09-15-2014, 11:51 AM #3
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Default Re: How far does a 1W blue laser go

General answer i would say it would go very far, it would even be visible from space.
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Old 09-15-2014, 01:32 PM #4
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Default Re: How far does a 1W blue laser go

Yes, it will go very far. And most of the light from your laser will make it through the atmosphere and into space. Though, you wouldn't be able to see the beam in space for 3 reasons:

1: Wayyyyy too far. You can't even see your beam travel higher than the clouds.
2: It wouldn't be a beam anymore at that distance, it would be a huge blue flashlight covering a football field (if there was one in space).
3: There are VERY few dust particles and air molecules in space. (nothing much for the photons to bounce off of)

But yes, as Mortis said, my guess would be that people above our atmosphere and in space would be able to see a blue light on the surface.
If you meant you want to know how far your laser will go and still see the dot, see 2 posts up by ARG.
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Old 09-15-2014, 03:40 PM #5
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Default Re: How far does a 1W blue laser go

In space, little to nothing for the light to bounce off of, so no,no beam. Austin Astronomy club fired a 1W blue at the ISS (space station) and the crew reported observation of the LASER origin.
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Old 09-15-2014, 03:52 PM #6
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Default Re: How far does a 1W blue laser go

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Originally Posted by 123splat View Post
In space, little to nothing for the light to bounce off of, so no,no beam. Austin Astronomy club fired a 1W blue at the ISS (space station) and the crew reported observation of the LASER origin.
Yea, what Splat said.
Btw, that's cool the people in the space station could see the 1W blue from earth. Did they say how visible the blue light from the operator was?
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Old 09-15-2014, 04:08 PM #7
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Default Re: How far does a 1W blue laser go

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Originally Posted by SilverFire View Post
Did they say how visible the blue light from the operator was?
Amateur Astronomers Flash the Space Station with 1W Blue Laser
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Old 09-15-2014, 04:11 PM #8
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Default Re: How far does a 1W blue laser go

Thanks!
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Old 09-15-2014, 06:37 PM #9
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Default Re: How far does a 1W blue laser go

A parabolic reflector was left on the moon and a greenlaser was bounced off it and was detected by telescope back on earth-- +6 to starlight for that link!!
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Old 09-16-2014, 10:54 PM #10
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Default Re: How far does a 1W blue laser go

Quote:
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General answer i would say it would go very far.

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Old 09-17-2014, 12:15 AM #11
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Default Re: How far does a 1W blue laser go

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Originally Posted by hakzaw1 View Post
A parabolic reflector was left on the moon and a greenlaser was bounced off it and was detected by telescope back on earth-- +6 to starlight for that link!!
Yeah they did it on the Big Bang theory TV show. LOL
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Old 09-17-2014, 01:09 AM #12
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Default Re: How far does a 1W blue laser go

https://www.youtube.com/watch?v=wopKCDp7tU0
here is how it would look form far away but still on earth..
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Old 09-20-2014, 08:06 PM #13
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Default Re: How far does a 1W blue laser go

That blue laser in the you tube video from the last post would be ten times brighter at that distance if they had a 10X beam expander on it (and if your eyes were calibrated to tell the exact difference, we can't) but also ten times harder to aim it at you with the far narrower beam at distance. However, go out 80 miles and they can get the light targeted on you just as easy and would look just as bright that much further away using such an expander, if you could get that far out and still have a line of sight shot.
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Old 09-21-2014, 01:35 AM #14
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Default Re: How far does a 1W blue laser go

My green seems to go way further than my blue with a 3 element lens, i know because blue have the beam specs of a turd but still, why don't people go on about how far greenies can go
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Old 09-21-2014, 01:37 AM #15
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Default Re: How far does a 1W blue laser go

When I look at the end of my beam going way out yonder into the heavens, I wonder, it appears to just stop, of course it isn't, but what is causing the beam to appear to almost abruptly end?
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Old 09-21-2014, 09:01 PM #16
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Default Re: How far does a 1W blue laser go

Thats because not much light is reflected back and to the eye it seems the beam just cuts off but it goes much further then the human eye will even be able to see...
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