I wouldn't waste your time with stacked diodes and prism pairs -> I found it gave very poor far field.
If you want a pair of prims to loan + experiment with, I could lend you a set.
The best thing I have found is not to add any optics to the "compound beam" as you put it.
The best I could manage was 8x diodes with 4.5x4.5mm at aperture, 1.1mRad, H+V Pol.
What are you trying to achieve exactly?
e.g. beam size / shape to fit on scanners etc. At what divergence is acceptable?
Cheers,
Dan
- There is no such word as "can't" -
- 60% of the time it works every time -