Co2 Laser Combiner Mirror orientation (arrow)

[injunear]

I just bought a combiner fixture and lens from lightobject but there's no instructions on how to orient the lens in the fixture. I read somewhere that the mirror has an arrow (this one does on the edge of the mirror).

Does anyone know if the arrow points in the direction of the beam (away from the tube) or towards the tube? I think it's away from the tube but want to be sure.

Thanks
Bob T.

[Tech_Marco]

Away from the tube.

It is juat a little better (optimal)

Marco

[Craig_Johnson]

Along those lines - I just purchased a Focus Lens and it is flat on one side and curved on the other. I assume the curve goes on the down side? so the beam hits the flat side and is focused thru the curved side? I forgot to check the old one when I pulled it (sort of fell out)
Thanks

[Tech_Marco]

Flat or concave side facing down, curve up(covex) facing up hit directed by the laser


Marco