- Joined
- Feb 15, 2011
- Messages
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Ok, so first off hello everybody! I'm new to this forum, but certainly not new to lasers.
Just got my 124mw green laser and it's bitchin. One thing I've always wondered though. How do manufacturers calculate the "range" of a laser beam?
Now I understand about beam divergence, so I'm wondering if when someone says their laser has, say, a 100 mile range. Is that a 100 mile VISIBLE range or just the range that the output power should create, visible or not? Of course, weather would be a factor, but for argument's sake let's just say it's clear and about 60 degrees.
I did a rough calculation. I have no clue whether or not it's accurate, or even correct for that matter, but I looked at the typical "range" claimed by various manufacturers of your standard 5mw greenie, which seems to state that the range is approximately 1200 feet.
So, I did the following:
5,280ft / 1200ft = 4.4 (how many 5mw pointers output power needed for one mile?)
Then I divided 124(mw) by 4.4 and I get 28.181818...
So it seems that my 124 mw laser would have a range of 28 miles, which seems a little more plausible than say 60 or 80.
Then again, I'm probably the worst person to ask a math question, and am quite possibly dead wrong and have made myself look like an idiot. But hey...I'm sticking my neck out to learn dammit.
This is where I think there may be a flaw in my formula..
If it takes 4.4 5mw greenies output power to go 1 mile (assuming at least that part of my math is correct), that would be 22mw. Divide 22 from 124 and you get 6.2.
Which would mean that my 124mw greenie would have a range of 6.2 miles, which also seems plausible.
Tell me what you guys think.....
Just got my 124mw green laser and it's bitchin. One thing I've always wondered though. How do manufacturers calculate the "range" of a laser beam?
Now I understand about beam divergence, so I'm wondering if when someone says their laser has, say, a 100 mile range. Is that a 100 mile VISIBLE range or just the range that the output power should create, visible or not? Of course, weather would be a factor, but for argument's sake let's just say it's clear and about 60 degrees.
I did a rough calculation. I have no clue whether or not it's accurate, or even correct for that matter, but I looked at the typical "range" claimed by various manufacturers of your standard 5mw greenie, which seems to state that the range is approximately 1200 feet.
So, I did the following:
5,280ft / 1200ft = 4.4 (how many 5mw pointers output power needed for one mile?)
Then I divided 124(mw) by 4.4 and I get 28.181818...
So it seems that my 124 mw laser would have a range of 28 miles, which seems a little more plausible than say 60 or 80.
Then again, I'm probably the worst person to ask a math question, and am quite possibly dead wrong and have made myself look like an idiot. But hey...I'm sticking my neck out to learn dammit.
This is where I think there may be a flaw in my formula..
If it takes 4.4 5mw greenies output power to go 1 mile (assuming at least that part of my math is correct), that would be 22mw. Divide 22 from 124 and you get 6.2.
Which would mean that my 124mw greenie would have a range of 6.2 miles, which also seems plausible.
Tell me what you guys think.....