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Info optics for a smaller beam at 5m

Hurry

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Mar 6, 2017
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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?
 





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Apr 24, 2013
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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

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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

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Yes the NUBM44 is really dangerous. You need OD 5 goggles.
 

Encap

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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!).
 
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CurtisOliver

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Well we already pointed out that the application is not a good choice either. :whistle:
 
Last edited:
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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.
 




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