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A 50mw as a signaling device

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fordarryl

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A group of us are going hiking and we are wondering if a 50mw green is visible from the side when pointed skyward. Can it be used to be led to someone who is lost? I mean when it's dark.
 





KiLLrB

KiLLrB

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ya but not as much as 200mW :eg:

from the side far away say half a mile i dont think you can see it... I had a 150 mW and a friend that lives about a mile away he said he could see it but not real bright.

But I think you are on to something... Taking a real bright green laser on a hike in the wilderness isnt a half bad idea. If you get lost you can use it to signal and to light a fire for heat :)
 
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RA_pierce

RA_pierce

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No.
Unfortunately, you would need a LOT more power for a beam to be visible with a viewing angle of ~90 degrees in excess of 100 feet from the beam source.

The spot will be clearly visible if pointed on tree tops or hills, though, and over more than several hundred feet. If used this way, it may be effective as a signaling device, but it will not work as you described.

In low humidity, a 50mW green laser's beam will be visible up to about 40 feet away from the source- give or take a few.
 
KiLLrB

KiLLrB

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RA_pierce said:
No.
Unfortunately, you would need a LOT more power for a beam to be visible with a viewing angle of ~90 degrees in excess of 100 feet from the beam source.

The spot will be clearly visible if pointed on tree tops or hills, though, and over more than several hundred feet. If used this way, it may be effective as a signaling device, but it will not work as you described.

In low humidity, a 50mW green laser's beam will be visible up to about 40 feet away from the source- give or take a few.
Click to expand...

ya i had to point the laser towards his house for him to barely see it.

@ OP maybe a flare gun or something similar would better suit your needs.
 
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fordarryl

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Thank you for your quick replies! We were looking at 50mw because of the economic of that size. I like the idea of "lighting up" high objects and I think we will experiment with that idea. We know the eye danger of them and will be very careful.
 
KiLLrB

KiLLrB

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fordarryl said:
Thank you for your quick replies! We were looking at 50mw because of the economic of that size. I like the idea of "lighting up" high objects and I think we will experiment with that idea. We know the eye danger of them and will be very careful.
Click to expand...

They do work great for "star pointing" ;)
 
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fordarryl

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Flare guns are fine, but a laser pen is so much smaller. Besides, what's cooler then having a laser in your pocket!
 
KiLLrB

KiLLrB

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brando132 said:
And you wouldn't want the flare gun going of in your pants!
Click to expand...

:crackup: that might be bad lol but would a 200mW laser be any better... Just think youre walking down the trail and the next thing you know your testicles are smoking XD
 
brando132

brando132

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KiLLrB said:
Was kidding i edited my post you caught me editing.


BTW you post really fast do you click the refresh button waiting for the next post lol. P.S. kidding again :p
Click to expand...

:thinking: Say what now?

Nah, I just reload the latest post thing at the bottom to see if there is any interesting threads.

P.S. If your wondering why I "took so long", I was playing a little BF:BC2:evil:
 
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KiLLrB

KiLLrB

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brando132 said:
:thinking: Say what now?

Nah, I just reload the latest post thing at the bottom to see if there is any interesting threads.

P.S. If your wondering why I "took so long", I was playing a little BF:BC2:evil:
Click to expand...

Sweet BFBC2 is out!!! Is it any good. Ive been taking a break from gaming ever since the MW2 fiasco..
 
brando132

brando132

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I haven't played any of the other BF games but I think this one really good.

Which fiasco was that? I haven't played for about a month.

Do you have a PS3?
 
KiLLrB

KiLLrB

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brando132 said:
I haven't played any of the other BF games but I think this one really good.

Which fiasco was that? I haven't played for about a month.

Do you have a PS3?
Click to expand...


Nah im on PC they took dedicated servers out of the game so no more custom dedicated servers with mods:( I was a mapper/modder and that was half the fun for me.
 
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