Visibility 50mW vs 100mW

[hampsterMSR]

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

 

[sinner]

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

 

[Paddy]

Green Lasers: What Can Certain mW Do? - YouTube
Have a look at this, helped me lots.

 

[hampsterMSR]

Green Lasers: What Can Certain mW Do? - YouTube
Have a look at this, helped me lots.

So, aparantly from 50mw to 100mw the diference in visibility is relatively small.

 

[LaZeRz]

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.

 

[hampsterMSR]

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

Well, in the video, comparing the diferent powers, I couldn't notice almost any diference, and it was side by side..

 

[LaZeRz]

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

 

[hampsterMSR]

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

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

 

[LaZeRz]

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

 

[SerpantSlayer]

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

at night you can see a beam with 5mW of green

 

[magmabeam]

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

 

[honeyx]

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

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]

agreed^
i see a pretty big difference in person, and it looks nothing like it does on videos
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]

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.

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.

 

[rhildinger]

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