- Jul 10, 2015
There was a discussion on PhotonLexicon back in 2006 about producing a custom "axicon" optic that might be helpful to your build. (Despite the fact that there are axicon lenses, that's not what this was about.) The idea was to start with a rod with a conical tip and then grind 4 (or more) symmetrical flat faces into the tapered tip. Then cut off the tip, mount it on a backing plate, and drop the whole thing in a vacuum deposition oven to coat those flat faces with dielectric film to make them into high-efficiency first-surface mirrors.
Now you could aim an array of 4 (or more) diodes at those faces and the resulting output beam would be a tightly-packed cluster of collimated beams that were perfectly parallel to each other - no knife-edge mirrors required. There was even talk about drilling out the middle of the rod so you had room for a central beam.
The project never really went anywhere, but the physics were sound and the actual manufacturing process was fairly well described. I think something like this could still be done affordably, and it would certainly simplify any optical arrangement where you needed to combine several diodes together into a single, composite beam.
Food for thought...
We have had those ideas too and as the beam width is the limiting factor we could use cut mirrors about the width of a beam.
See this Thread....
HMMMMM ??? What other group of Technology / Users is obsessed with heat removal ....Overclockers !!! SO...I will see what they say ????? Aside from Liquid Nitrogen cooling.....For starters.....They seem to like this fan...laserpointerforums.com
A More advanced version of this IS now about 50% complete !!! C-19 slowed things down !!! The name of this project is...
" The Green Kraken " Alaskan has commissioned me to design and build. I MUST get his approval to post ANY details...but...I assure you...THIS will be completed by Fall 2020....and will be Epic !! We are hopeful to deliver 10.4 W out the front door in a small beam pattern array.
Hold on to your hat !! CDBeam
@ CDBeam777 : Aligning all those beams will be challenging, can't wait to see it.