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



Info optics for a smaller beam at 5m

Hurry

New member
Joined
Mar 6, 2017
Messages
22
Points
0
Hello everyone!

I'm new in the environment and do not have much experience in optical ...

I purchased a nubm44 diode and would like to install the optical order to have a small beam 4/5m meters and not lose power.

I saw the Cylindrical lenses (2 and 3X), but the beam could be about 20mm to 5m, i wanted something smaller, around 5mm or less (i'm dreamer?).

What do you recommend optics?
 



Antharak

Active member
Joined
Apr 24, 2013
Messages
549
Points
43
Very bad idea. If you use that diode, your house will be on fire and you will be blind in about ten seconds. Go back and do a search on safety, and the dangers of a NUBM44 diode.
Ed
 

Hurry

New member
Joined
Mar 6, 2017
Messages
22
Points
0
Very bad idea. If you use that diode, your house will be on fire and you will be blind in about ten seconds. Go back and do a search on safety, and the dangers of a NUBM44 diode.
Ed
is really dangerous?

I use safety glasses with 20% light transmission with potection from 190-540nm and 800-2000nm wave lenght.

it's not enough?
 

CurtisOliver

Well-known member
LPF Site Supporter
Joined
Jun 12, 2015
Messages
6,880
Points
113
Yes the NUBM44 is really dangerous. You need OD 5 goggles.
 

Richie89

Well-known member
Joined
May 9, 2015
Messages
1,159
Points
113
Yeah hurry, the M44 diode is a demon in a 9mm can :eg:
 

Encap

Well-known member
Joined
May 14, 2011
Messages
5,644
Points
113
Not a good choice for your application many reasons among them: poor beam quality/wide beam/high divergence as you pointed out.

Divergence on these high power multimode diodes is terrible - there are things you can do to improve them but you have to make a trade somewhere, either for output power or beam diameter (or both!).
 
Last edited:

CurtisOliver

Well-known member
LPF Site Supporter
Joined
Jun 12, 2015
Messages
6,880
Points
113
Well we already pointed out that the application is not a good choice either. :whistle:
 
Last edited:

Alaskan

Well-known member
LPF Site Supporter
Joined
Jan 29, 2014
Messages
12,478
Points
113
You can take a large PCX lens and put it in front of a NUBM44 to focus the beam down to a tiny spot 15 feet away. I did this with a 7 inch diameter PCX lens that had a 18 inch focal length.
 




Top