- Jul 10, 2015
Using a non fac diode with a G2 and c-lens pair is better because you get a better beam and you can use a beam expander after, also able to knife edge but if people just want to get a tighter/hotter spot at distance without using c-lens pairs then this fac diode and a larger/longer FL collimating lens could be used.Aren't these diodes more expensive than just the plain diodes available to us? I just don't see the utility in using them for much except maybe as an engraver. Seems like you must jump through a lot of hoops to get a reasonably collimated beam while the stock diodes do that much more easily. Still can't see the what is to be gained over using cyl lenses.
I was concerned about how much a single FAC could help this diode but I was also hoping to be surprised and using a larger longer FL lens was one of the 1st things I tried but I was also hoping for something ( closer in appearance ) to a Gaussian beam like we see from dpss lasers but apparently that's not in the recipe.
I don't see these fac diodes as the " FIXED " diodes we dream of but they could have some application, personally I would rather use a c-lens pair because we also need to keep the can window dust free to avoid burn on damage and because you can use the readily available 3X beam expander after a c-lens pair, it's not that much more work when you think about it but if we had a lens picked out for each fac diode and ready made hosts to hold the lens and diode then they could be popular with burners who want to get off the desktop or for home CNC use.
But this is just the fac-nubm08.......the fac-nugm03 from what I hear is possibly more useful with our standard lenses but we shall see, also the fac red diode but it has such aggressive divergence that it will likely be worse than the blue, even the pics of it's raw output look messy IINM.
Yep. More like 1 step forward through a mud puddle with bare feet bet we're getting somewhere.OK, great news, then it appears we can indeed use FAC corrected diodes, just that we need to use longer FL larger diameter lenses. Too bad we can't use our ~6 mm diameter lenses to knife edge together with smaller beam diameters without adding additional corrective optics. Two steps forward and one back, but at least a step forward overall