Gaussian Beam Expander?

[Minamoto Kobayashi]

I wish to buy a professional expensive beam expander 2x-8x Gaussian type for my handheld builds.
It has two focusing mechanisms: one for the divergence and another for the diameter of the beam.
I do not know well how the Gaussian BE works. The only good document that I have found online is this:

https://marketplace.idexop.com/store/SupportDocuments/All_About_Gaussian_Beam_OpticsWEB.pdf

But I'm in doubt for some facts:

- 2x 8x means that the outputting beam will be minimum 2 times the diameter of the original beam? (the lenses are afocals, so I think there can be a magnification of the input beam);
- With two mechanisms, one for the divergence and another for the beam diameter, it means that I can focus a very small dot at great distances, since first I focus the beam and then narrow it, obtaining an incredible tiny dot? It seems impossible to be real!

The expander is used in the laser marking machines, and I know for sure that the two regulations are necessary to have a powerful burning dot, but also the possibility to obtain thicker edges for reasons. But ... this works also for greater distances like miles far away?

This is the expander:

https://www.qioptiq-shop.com/en/Pre...rs/Variable-Magnification-Beam-Expanders.html

 

[Lifetime17]

Hi,
check out the Sinner Cypreus 3 host and the Sinner beam adapter and beam exstender. There awesome quality products. i have them very well made and affordable. Check out my post in the optics section has pics of the build.

 

[Minamoto Kobayashi]

I already have this build .. I'm looking for a more professional beam expander!

 

[Alaskan]

What input aperture size? This may or may not be of interest to you, but thought I'd link to it just in case:

http://fp.optics.arizona.edu/opti471B/Reading/Lab3/MG_GBO_BE_Lenses.pdf