Welcome to Laser Pointer Forums - discuss green laser pointers, blue laser pointers, and all types of lasers



How do I focus my laser?

Elektrotechniker

Well-known member
Joined
Nov 10, 2008
Messages
4,211
Points
63
Hye, how's everybody? I have been inactive for a while because of school. Anyway, I opened this thread, as I do not have any idea on how to focus my 50 mw ledshoppe green laser so it can be more powerful. I know I can do this with a lense but I don't know what kind to use :p
Any help will be much appreciated. Thanks.
 



FlightLevel350

New member
Joined
Apr 2, 2009
Messages
355
Points
0
You might consider using a collimator, which uses a concave lens to spread the beam out, and a convex lens to refocus the beam. I have never used these personally, but they are easy to make and inexpensive. The lenses can be mounted in a PVC tube and adjusted before being secured in place
 

ElektroFreak

New member
Joined
Nov 7, 2008
Messages
5,727
Points
0
To be honest, if you're just focusing to burn things you can use an ordinary magnifying glass.
 

diachi

Well-known member
Joined
Feb 22, 2008
Messages
9,793
Points
113
To be honest, if you're just focusing to burn things you can use an ordinary magnifying glass.
Yeah, ElektroFreak got it.

BUT using a lens makes the laser LESS powerful, BUT it focuses all the light to a tiny point so that it will burn better. Same idea as with a magnifying glass and the sun.

Regards,

Adam
 

lazorman

New member
Joined
Jun 17, 2009
Messages
187
Points
0
were can i get a colmnator for a ledshoppe or romeo pointer?
 

john_lawson

Well-known member
Joined
Feb 22, 2008
Messages
3,193
Points
48
Hye, how's everybody? I have been inactive for a while because of school. Anyway, I opened this thread, as I do not have any idea on how to focus my 50 mw ledshoppe green laser so it can be more powerful. I know I can do this with a lense but I don't know what kind to use :p
Any help will be much appreciated. Thanks.

the ones i purchased had a really fat beam like 2.5 mm you may never get it to really burn good although a magnifying glass is your best bet


hey i used one on my blue RPL yesterday and popped a balloon lol it peaks at 50ish
 

93shad

New member
Joined
Jul 16, 2009
Messages
47
Points
0
what about a beam expander?
wont it spread the beam then put it back at a focal point? are there any for pen style lasers?
 

themandalorian

New member
Joined
Jun 14, 2009
Messages
889
Points
0
Larry has a new lens I think that focuses it better and doesn't cause your green to lose power but actually increase it
 

93shad

New member
Joined
Jul 16, 2009
Messages
47
Points
0
Larry has a new lens I think that focuses it better and doesn't cause your green to lose power but actually increase it
larry who?
do you have a link? my optotronics pen does not have the tip that comes off so the DL beam expander wont work, any others?
 

BowtieGuy

Well-known member
LPF Site Supporter
Joined
Oct 14, 2012
Messages
6,090
Points
113
Yes, you could use this lens, or a G-2 type single element lens which is available from DTR's store.

BTW - You should probably post this in your other thread (Can 300mW or 500mW burn white paper?), or start a new thread as this thread has been dead for over 7yrs.
 
Last edited:

Tedro

New member
Joined
Nov 16, 2016
Messages
9
Points
0
Didnt want to start new thread for one simple question, and it wouldnt fit in the category my thread already is in. Anyways wont do this again.

And thanks. Will look at the G-2 lens type
 




Top