This problem is everywhere. Powerful 635... (I call them the big red flashlights) has a horrible specs. What Ive done is to put a Galileans beam expander in reverse. It works great for 20-30 meters. And that enough for my purpose.
Plus there is another problem 635 beam. It will not fit on fast galvo scanner mirror. So you will loose about 20-40%
Oh yeah forgot to mention...powerful 635 normally has square beam.
Last edited by Dr Laser; 06-15-2007 at 03:28.
I hired an Italian guy to do my wires. Now they look like spaghetti!