Collumating non coherrent light (*topic changed*)

[Cyparagon]

Re: Collumating non coherrent light (*topic change

It would use many, many times the glass and be many many times heavier and many many times the expenditure.

 

[Switch]

Re: Collumating non coherrent light (*topic change

And in the case of a lighthouse it doesn't matter if your focused spot is crisp clear or not, you just want it focused.

 

[caleb]

Re: non coherent beam (*topic changed*)

Well yea, I mean, if I try to focus one of those 9 led flashlights with a lens on the wall I get 9 nice and round dots. :-/

i can do this and i reckon im getting atleast 50m. i thought of putting heaps as close together and trying the same thing.

i just want a 'laser' like beam from LED's to be a smart arse if coppas come to my house!!

EDIT: do you think adding aspects of lasers will work... see image.

 

[Things]

Re: Collumating non coherrent light (*topic change

I have a nice 3W blue star LED here, if I focus it correctly to a point like 3cm infront of it, I canmake stuff warm, but if you were to compare it to a laser, the divergence would be like 20mRad.

 

[FireMyLaser]

Re: Collumating non coherrent light (*topic change


Post your set-up and I'll try to replicate it with a 5.5W royal-blue LED and see what happens.

 

[keeperx]

Re: Collumating non coherrent light (*topic change

now were getting somewhere...