3 ms·
Since you're using lasers, how would you keep from damaging the subject's eyes if they accidentally get their face in the path of the beam?
by bilegeek 5y ago
Since you're using lasers, how would you keep from damaging the subject's eyes if they accidentally get their face in the path of the beam?
- murbard2 5y agoI suppose you could defocus it a bit so that it hits a biggish spot.