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

[HitShane]

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?

 

[sinner]

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]

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

 

[grainde]

You can definitely improve on the dot using a different lens. Try Lazeerer heres a thread about his C lens: http://laserpointerforums.com/f65/osram-pltb450-1-4w-450nm-diodes-77127-2.html :beer:

Edit: AnthoT also had a nice lens but Im not sure hes still selling them: http://laserpointerforums.com/f49/found-some-interesting-445-lens-76297.html You could try to email him if you wanted one.

 

[Cyparagon]

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:

 

[HitShane]

I see... :/

 

[steve001]

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]

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

 

[Cyparagon]

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

 

[DrSid]

'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]

D.A.

dont look to me for any help ever/