Comment by detaro
4 years ago
You basically can't make laser pulses safe and melt things at the same time, because by nature of having the energy in a short pulse created heat doesn't have time to distribute, so it doesn't matter if you hit a tiny thing or a tiny spot on a larger object, the damage done locally is the same.
I’m confused, are you saying that the minimum amount of energy in an infrared pulse sufficient to melt a fly’s wings (< 1mm) would necessarily also damage a human eye?
I have to believe there is a threshold value of safety, particularly with IR. You can tell me I’m wrong, but please provide a bit of physics to justify it.