4 ms·
your beam waist is going to increase (and intensity is going to drop) after a few hundred meters. you'd have to lower the whole laser down the hole
by avsteele 2y ago
your beam waist is going to increase (and intensity is going to drop) after a few hundred meters. you'd have to lower the whole laser down the hole
- bilsbie 2y agoMaybe use adjustable lenses?
- lightedman 2y agoThat's what adjustable diopters are for. Also, at certain power levels, the beam is self-focusing.