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Old 03-29-2012, 02:11 AM #1
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Default Looking for Beam Expander

Hello, I renew my apology for my English ..
I'm looking for a suitable beam expander to my WL arctic. Does not exist on the market, so I need some advice on some product adaptable.
Can anyone help me build it? Or maybe someone would be able to build a support adapted to existing ones on the market? I was looking at those of jetlasers, unfortunately have a graft larger than 2mm. But in your opinion, are of good quality?
If you already have (home made) I can evaluate them!


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Old 03-29-2012, 03:25 AM #2
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Default Re: Looking for Beam Expander

Check here... http://laserpointerforums.com/f55/je...ml#post1049450

It is a beam expander that comes with three adaptors, maybe one will fit?
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Old 03-29-2012, 04:08 AM #3
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Default Re: Looking for Beam Expander

Dear sir,
Hi, thanks for your inquiry.
I just checked the head diameter of the wickedlasers 1w 445nm model is 35.8mm while one of the adapters we provide is the 36mm head diameters, so the beam expanders are also useable for the laser you own but probably not be perfectly tight but you can enclose something to make it more tight. Hope you understand.
Thanks for everything!
Best regards,
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What do you think?
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Old 03-29-2012, 04:32 AM #4
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Default Re: Looking for Beam Expander

But .. the quality of this product from 1 to 10?
I'm not a great expert on expanders, and I can see that there are lenses like these that cost 10 times as much .. I suppose there must be a reason
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Old 03-29-2012, 05:02 AM #5
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Default Re: Looking for Beam Expander

Jetlasers quality tends to be a 10. WL 1. 10 being highest 1 being lowest.
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Old 03-29-2012, 06:03 AM #6
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Default Re: Looking for Beam Expander

Wl if launched with great strength could become a weapon. It has a great weight.
jet Lens are too light
Wl 1
Jl 1
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Old 04-03-2012, 05:48 AM #7
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Default Re: Looking for Beam Expander

ok, I tried to get him .. and the measure of the attack fits the size of my arctic. Unfortunately, the laser beam diameter is 5 mm, while that of the beam expander is 2.5 mm. This causes the diffraction, it is evident a ring of light around the radius. The beam in the first 2 meters is very wide, but suddenly I realized that long distance does not converge as expected. At 25 meters the beam diameter is exactly the same as before, however, weaker than before.
This can be caused by the difference of the output beam and the lens input?
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Old 04-03-2012, 04:28 PM #8
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Default Re: Looking for Beam Expander

Quote:
Originally Posted by mikelowreen View Post
ok, I tried to get him .. and the measure of the attack fits the size of my arctic. Unfortunately, the laser beam diameter is 5 mm, while that of the beam expander is 2.5 mm. This causes the diffraction, it is evident a ring of light around the radius. The beam in the first 2 meters is very wide, but suddenly I realized that long distance does not converge as expected. At 25 meters the beam diameter is exactly the same as before, however, weaker than before.
This can be caused by the difference of the output beam and the lens input?
Hi Mikelowreen,
You're not going to find a commercial beam expander for the arctic.
The main reason is because they have terrible beam quality/shape and the commercially available expanders are made for quality beams which are usually less than a couple millimeters in diameter.

You're right about the reason for the loss of power when trying to feed a 5mm beam through a 2.5mm input aperture.
You will need one that has an input aperture equal or greater than the beam diameter.
The exit aperture of the beam expander matters as well or there will be huge losses.
For instance if your beam diameter is 5mm and the input aperture is also 5mm, you need to make sure the exit aperture is greater than the "X" factor multiplied by the input beam diameter.
with 5mm beam you will need an expander with a clear exit aperture of
50mm for a 10x
100mm for a 20x

Good luck in your search
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Old 04-06-2012, 08:23 AM #9
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Default Re: Looking for Beam Expander

I understood perfectly, thanks! At this point, someone can advise me some product with these characteristics? Maybe could be constructed with lenses of a telescope?

(By shortly I will open a new thread to sell my Jetlaser beam expander 10x , since I do not need ..)
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