Anyone know where to get very small CYL lens 6~10mm, only the convex part but with 50mm+ FL?
I just realized the concave part is not necessary If I am not looking for an infinite beam.
No, I would say you are wrong. The laws of optics (divergence) cannot be ignored in this way. Even for focusing at 200mm an expanded beam would give smaller spot and more power density then raw beam from 31T or 08 sock lens.
2 years ago I have experimented with 08 block and I am sure that the spot of 1-2mm in diameter at 200mm I could get by focusing the 8 expanded beams (post 9) was much tighter than anyone could get from just focusing a 20-pack of raw beams from 31T. Even if 31T emits 2-3x more watts in total.
Hi, I am returning with another build about what one can do with a virgin NUBM08 block. Let us call it - Gatling laser??? You can consider this thread as a continuation of that one: https://laserpointerforums.com/threads/test-of-diodes-in-nubm08-block-all-at-once.103392/ but now I want to play...
But that set up demanded some of CNC work and not cheap LSG lenses, not just one focusing lens and that´s it...
However, now I know how I could make it much cheaper with just 4 pairs of CDBEAM GB2 big cylindricals... If we receive them at the end.