Comment by dotancohen
Comment by dotancohen 2 days ago
I wonder how well the opthalmologist is doing. These guys are going to be paying him a visit playing around with those lasers and no PPE.
Comment by dotancohen 2 days ago
I wonder how well the opthalmologist is doing. These guys are going to be paying him a visit playing around with those lasers and no PPE.
That's (again) less energy than a flashlight puts out these days, so the beam had to be tightly focused in your case. That isn't how these things work.
There is nothing special about "lasing power." It amounts to a 45-watt light bulb, nothing more and nothing less.
A 45 watt light bulb spreads the energy in all directions - at 1 meter away that's about 3 watts in every square meter or roughly 0.000003 watts per square millimeter. The laser is putting 45 watts into that same square millimeter at the same distance.
Of course the laser is tightly focused. That's pretty much one of the defining properties of laser devices. How else do you think the laser is heating the microprocessors in the video?
Eh, I don't see the risk, no pun intended. It's not collimated, and it's not going to be in focus anywhere but on-target. It's also probably in the long-wave range >>1000 nm that's not focused by the eye. At the end of the day it's no different from any other source of spot heating. I get more nervous around some of the LED flashlights you can buy these days.
I want one. Hot air blows.