50mW greenie pops a balloon from 20 feet un helped!!

[Don't Laze Me Bro]

WOW guys my new LED shop 50mW greenie just pop a balloon from 20 feet with no help from a lens or mod or anything!!!!! scopeguy20 will tell you it is a led shop 50!!!!!!!
I will post the vid link in an update here in a sec!!!

:thanks:

 

[Don't Laze Me Bro]

ok here is the vid!!!

YouTube - videoclip425's Channel

look at the front page vid!

 

[cust11]

It would be safe to say that your laser is overspec and has very good divergence. Congrats!

-Mike

 

[Don't Laze Me Bro]

It would be safe to say that your laser is overspec and has very good divergence. Congrats!

-Mike

yep its over spec, but has a horrible beam size... at the laser head its 2mm!

 

[Deleted member 8382]

then it' can't have a good divergence, I bet the laser is focused at a concrete distance and you just found it with that balloon.

If it wasn't focused (foucused to the infinity) at 20 feet the dot size would be 4mm at least and with 4mm and 70mW you don't pop a balloon.

 

[Grix]

then it' can't have a good divergence, I bet the laser is focused at a concrete distance and you just found it with that balloon.

If it wasn't focused (foucused to the infinity) at 20 feet the dot size would be 4mm at least and with 4mm and 70mW you don't pop a balloon.

I thought that larger beam diameter = usually better divergence.

 

[ElektroFreak]

^That's correct. The beam diameter at aperture plays a huge role in determining divergence. Good divergence typically requires the beam to be expanded and recollimated with a larger beam diameter. Most of the time this occurs to a certain degree within the laser head itself, but external beam expanders are available for this very reason.