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How far away is a 1.5 blue laser clear visible?

Valhalex

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May 14, 2020
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I just bought my first high powered laser, an awesome custom build from Barnett Unlimited. It’s very powerful and I’m curious how far someone would clear notice the beam.
 



Richie89

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May 9, 2015
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The actual beam? Not far at all to be honest. I actually conducted a small experiment not long ago where I put my 2.1W PLTB450B in a glass mug and fired it up into the sky back in the winter time and walking down the street. The beam itself was very visible when I got out into the street. But as I walking down the street it quickly started to disappear. Now if you want someone to see the beam from a few neighborhoods over, possible even further then you'll need a relatively powerful green lol. My 1045mw 525nm can probably be seen from a quite a ways away. (The beam) I hope this was what you were asking
 

hakzaw1

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Apr 2, 2009
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Aimed at you--brightest
looking 'down the beam'.- second most bright.
from the side - not very far in comparison.
Same power green would be better than blue or red.
under good conditions (low) you can scan clouds.
a special telescope can see some earth lasers from the Moon.

and iirc NASA- 'saw' the laser aimed at the earth left by USA Astronauts .
again by special optics-antenna..etc
I found lasing the clouds of smoke at fireworks shows very interesting.

AWESOME lift off today from Cape Canav. FL

God speed star pilots,, return safe..
 




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