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Visibility 50mW vs 100mW

hampsterMSR

hampsterMSR

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Hi, I'm curious, from 50mW to 100mW 532nm, will the beam be significantly brighter? or is just the burning that changes?
 





sinner

sinner

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It will be brighter and even more visible at night , from far places, afaik at 100mW green is too good, i owned a 10mW green and it was noooo damn way near the 100mW
 
LaZeRz

LaZeRz

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Yeh, you won't see much difference between the two unless side by side.

But, with a higher powered laser, it will appear brighter at different angles and will also burn better.
 
LaZeRz

LaZeRz

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That's with fog and on a camera, our eyes perceive light differently in different situations.
 
hampsterMSR

hampsterMSR

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LaZeRz said:
That's with fog and on a camera, our eyes perceive light differently in different situations.
Click to expand...

Okay, so for beam shooting at far distances,during night, how many mW would you buy, at relatively good prices?
 
LaZeRz

LaZeRz

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Personally I would go with 150mW's but it's completely up to you. You will need safety goggles at those powers.
 
magmabeam

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i don't see much difference at all between 50mw and 100mw greens, even side by side it's almost the same
 
H

honeyx

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magmabeam said:
i don't see much difference at all between 50mw and 100mw greens, even side by side it's almost the same
Click to expand...

Is there a chance your greens are metered? I can see a big difference between 50mW and 100mW with my nacked eyes. The same with 100mW vs. 200mW and 200mW vs. 400mW.


You can´t compare a video with some sort of fog to what you see in real under normal conditions.
 
joshshermannn1

joshshermannn1

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agreed^
i see a pretty big difference in person, and it looks nothing like it does on videos :p
one thing i did find a little weird; my 300mw green looks almost the same brightness as my 1.2w even though it should be 3.58x brighter.
brightness of the beam has alot of variables such as: fog, pollen, elevation, etc.
 
magmabeam

magmabeam

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honeyx said:
Is there a chance your greens are metered? I can see a big difference between 50mW and 100mW with my nacked eyes. The same with 100mW vs. 200mW and 200mW vs. 400mW.
Click to expand...
Maybe, I think one is overspec and the other is a little barely to spec but also measured with IR. So one is 80mw non-ir and the other is 60-70 non ir.
 
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rhildinger

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From what I understand, the power level required to achieve a certain increase in perceived brightness is a function of the square of that increase. In other words, 2x brightness requires 4x the power, 3x brightness requires 9x the power, 4x brightness requires 16x the power, and so on.

So if you want a laser that is 4x the perceived brightness of a 5mw laser, you need a laser with a power output 16 times greater, which is 80mw.

By this reckoning, the OP's question of the perceived change in brightness can be answered by taking the square root of the power factor increase. Square root of 2 = 1.41, so the percevied increase in brightness in going from 50mw to 100mw is 41%.

Of course, I could be completely wrong...

-Robert
 
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