Hi Michael

Buying A Powell lens from Laserline, Edmund or other big optical equipment suppliers is pretty expensive starting at around $250 USD. I did a little google search and found a few from Ebay etc. at a more reasonable cost for an amateur experimenter. The question is which one?

I have not yet got my head around what would be the ideal angle for the Powell lens assuming that the l operating range is from 100 to say 3000mm.

The laser driving the unit also is also a consideration I nice clean spot is required.

Regards
John

https://www.google.com/search?q=powe...l%20lens#spd=0