Rifter
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Whats the lowest divergence diode? Any color(thats visable)
Well 532nm green definitely has the lowest divergence. Red has got to be the worst out of any color.
This is incorrect. C-mounts and the 635/638nm red multimode diodes are some of the worst. Single-mode reds have very good divergence.
Whats the lowest divergence diode? Any color(thats visable)
does that exclude DPSS lasers? My 100mW 520nm with a 3 element lens has pretty good divergence. I can still see a small dot on clouds if the air is clear.
Look for bigger lenses, rather than a fancy laser diode.
The osram pl450 single mode also, along with any common 405nm diodes. Although it does seem, to me anyway, that DPSS still beats diodes in beam specs.
I just ordered parts to assemble a pl450 build and Im really looking forward to it