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Is there a lens that I can use with a 445nm Laser to make it round?

HitShane

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So, I am new here and on my way with a 1.9W 445nm SH-032. :) I will have pics up soon and the full specs. Why can't a lens be made to re contour a 445nm beam, to be a circle. Direct the light into a circle. If it is focusable, then It could always be made to be a circle...? Is a G1 or a 3 lens setup better?
 
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sinner

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If you want better beam specs, you can use 3-element structured Aixiz Glass Lenses.. G1 has horrible divergence and makes worse dot than the 3-element..

There are corrective optics and anamorphic prism pairs aswell if you want to go that route..
 

lasersbee

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You will never get a perfectly round beam profile from
a multimode LD. The output beam profile of a multimode
LD looks like this ------ :cryyy:


Jerry

You can contact us at any time on our Website: J.BAUER Electronics
 
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grainde

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Cyparagon

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The only way I'm aware to make a multimode diode's dot round is to fiber-launch it. It's more trouble than it's worth though. The rectangle is just something you've gotta learn to live with.



Focused and intensity reduced to show shape:

 

steve001

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So, I am new here and on my way with a 1.9W 445nm SH-032. :) I will have pics up soon and the full specs. Why can't a lens be made to re contour a 445nm beam, to be a circle. Direct the light into a circle. If it is focusable, then It could always be made to be a circle...? Is a G1 or a 3 lens setup better?
It probably doable, but not doable by any singular lens.
 

DrSid

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It could be done with single lens .. but it would have to be astigmatic.
 

Cyparagon

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^I don't think so. It might help with divergence, but I'm pretty sure it would still be rectangular or square.
 

DrSid

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'Help with divergence' is what we want right ? Question is how much. Can it be completely corrected ? I didn't see it done .. but does that mean it's theoretically impossible ? I don't think so. If the beam has only different divergence in each axis, it should be possible.
 

hakzaw1

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D.A.

dont look to me for any help ever/
 
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