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co2 laser expander

Posted: Sun Feb 15, 2015 10:32 pm
by amit2185
Dears,

I am building a co2 laser cutting machine using Synrad's Firestar ti60 series laser for cutting applications.
As all of you know, synrad's firestar ti60 series has output diameter of laser only 2mm (+- 0.3mm).
And I am making this laser stationary and want to use laser beam deflectors to draw the beam from x axis to y axis to focus lens and nozzle.
For such arrangement, which deflecting mirrors best suitable for the machine. (In terms of coating like gold, Si, Mo...)

I already searched website of lightobject and they have mirrors with capability to sustain against 60 w to 150w laser. But my doubt is that whether these mirrors are compatible with 2mm diameter 60w co2 laser to deflect. I am asking this question because in tutorial I read that before selecting any mirror its better see its capacity in terms of watt/ sqr cm.

Also, here mirrors wattages are in terms of CW and in my cutting machine I will not use laser in CW mode. Instead of, I will use laser in pulsed mode to cut material. Will it be okay to still use this mirrors?

Should I need to increase beam diameter using expander before it hits to deflecting mirror? (to decrease the watt/sqr cm)

Please help me as soon as possible.

Re: co2 laser expander

Posted: Mon Feb 16, 2015 7:03 pm
by Tech_Marco
Si seems the best candidates
Beam expander will give you very good performance on engraving. It make it very sharp
BX improve the collimation and it reduce stress on the mirror/lens as well.

Marco

Re: co2 laser expander

Posted: Sun Feb 22, 2015 8:19 pm
by brian257
So what does a laser like that cost and do you get much better performance than a glass tube?

Re: co2 laser expander

Posted: Sun Feb 22, 2015 8:51 pm
by Tech_Marco
Brian:

Beam expander is an optic device to enhance the CO2 light beam. It is not another kind of laser tube


Marco

Re: co2 laser expander

Posted: Tue Feb 24, 2015 7:38 pm
by brian257
I know what a beam expander is. I was wondering how much the Synrad tube costs and if it is much better than the cheapie glass tubes.