by "PartyPooper2012" (PartyPooper2012)
Published 04/27/2017 at 13:09
by "PartyPooper2012" (PartyPooper2012)
Published 04/27/2017 at 13:09
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Back when I was a kid, I was fascinated with unusual tools. Bulldozers, excavators, big trucks... and of course welders.
One day my neighbor was welding something and I was rather close. For safety he asked me to step waaaay back. So I did, but I kept watching what he was doing thinking I was safe distance away.
Next morning, it felt like I had sand in my eye balls. It hurt. It was uncomfortable. Dad told me I caught the light bunnies - those innocent light spots reflected off small shiny things like a watch or small mirror are called light bunnies in Russia.
Fast forward few decades, I learned that welding emits ultraviolet light which basically gives your eyes sun burn - just like your skin burns in strong sun without protection.
So here is the question - when I am watching Youtube videos of people welding, I see strong light, but it’s not hurting me.
Am I new superhero - WeldingMan?
Am I immune to this trickery now?
Probably not.
More likely UV rays don’t transmit over video recordings. And if that’s the case - why?
Is it the light sensor in camera? Can it be improved to a point it can capture and re-transmit? Give my enemies a good sunburn of the eyes?
"Twingo Tamer - About to descend into project car hell." (oppisitelock)
04/27/2017 at 13:13, STARS: 1
Even if the camera could receive UV you would need a display that could show it too. Not to mention that if cameras picked up non visible light as well as visible light the results would look... weird.
"benjrblant" (benjblant)
04/27/2017 at 13:14, STARS: 0
Your monitor/cell phone / tv screen do not emit the same UV light that welding does. If it did, lots of people would be in a world of pain.
"RamblinRover Luxury-Yacht" (ramblininexile)
04/27/2017 at 13:16, STARS: 2
No UV over the video recording, though some sensors can technically pick it up. Every bit of “extra” EM radiation past visible recorded in the file would make it take up more space, so the codec doesn’t bother. It’s like a court stenographer not writing down what the dudebros in the fourth row were talking about. No real ability to reproduce it in the typical monitor even if it *was* in the recording wavelengths, and the monitor brightness threshold is a tiny fraction of the welding light in the visible wavelengths anyway.
"Smallbear wants a modern Syclone, local Maple Leafs spammer" (smallbear94)
04/27/2017 at 13:16, STARS: 0
The cameras can but it’s filtered out. You can make an IR camera by removing the filter and replacing it with the black part at the end of a roll of film (or something similar).
At least, the sensors will pick up IR... I’d imagine UV as well but I’m not sure.
"Twingo Tamer - About to descend into project car hell." (oppisitelock)
04/27/2017 at 13:17, STARS: 0
I stand corrected.
"My citroen won't start" (lucasboechat)
04/27/2017 at 13:17, STARS: 0
You were blind since that day and since then you have been imagining all this. Nothing is real. Only death.
"PartyPooper2012" (PartyPooper2012)
04/27/2017 at 13:17, STARS: 0
well, they may not be visible to us mortals, but surely a gizmo could come along on purpose or by accident that can see more than we can...and maybe a screen could emit more than we can see.
"PartyPooper2012" (PartyPooper2012)
04/27/2017 at 13:18, STARS: 0
easter bunny? is that you?
"crowmolly" (crowmolly)
04/27/2017 at 13:19, STARS: 0
It’s a camera/display thing.
Off topic, this helmet makes you look like cyborg but it’s pretty cool in-use:
http://www.eyetap.org/~siggraph2012/
"PartyPooper2012" (PartyPooper2012)
04/27/2017 at 13:19, STARS: 0
so if brightness gods smiled upon some monitor, it might?
"PartyPooper2012" (PartyPooper2012)
04/27/2017 at 13:20, STARS: 0
if I still needed a helmet, this would be it
"Twingo Tamer - About to descend into project car hell." (oppisitelock)
04/27/2017 at 13:21, STARS: 0
It would have to be a very powerful screen to emit the level of UV needed to hurt your eyes too.
"PartyPooper2012" (PartyPooper2012)
04/27/2017 at 13:21, STARS: 0
I can see military developing a huge powerful monitor and showing some sports game on it to the enemies!
"RamblinRover Luxury-Yacht" (ramblininexile)
04/27/2017 at 13:23, STARS: 1
If you spend a couple tens of thousands to engineer an LED monitor that looks exactly like a normal monitor but has hilarious amounts of micro-LEDs that emit UV, then make it so that your targets computer can read a specialized kind of file, then make a specialized camera to make welding videos, and then replace your target’s monitor with your evil one, and then convince him to watch... then yes, you can sunburn someone’s eyeballs with welding videos. Shortly before the screen overheats and suffers permanent damage from that and from UV damage to the surface.
"PartyPooper2012" (PartyPooper2012)
04/27/2017 at 13:24, STARS: 0
"RamblinRover Luxury-Yacht" (ramblininexile)
04/27/2017 at 13:40, STARS: 1
They’ll be blind, AND THEIR MONITOR WON’T WORK!
"ThePlasticOne - no diggities expressed nor implied." (theplasticone)
04/27/2017 at 14:16, STARS: 1
Protective Shade rating for arc welding starts at Shade 9 and up. You need Shade 14 minimum to look directly at the sun (why do you think welding hoods only go up to 13?). If your monitor could get bright enough to require Shade-rated protection, you wouldn’t be using it as a monitor...
"TorqueToYield" (torquetoyield)
04/27/2017 at 14:19, STARS: 1
Your eyes can only perceive a small fraction of the electromagnetic spectrum. Consumer TV monitors/cameras only record/retransmit an even smaller fraction of that spectrum.
https://en.wikipedia.org/wiki/Electromagnetic_spectrum
Mind blown.
"AMGtech - now with more recalls!" (amgtech)
04/27/2017 at 21:30, STARS: 0
The light can burn your skin too. When I was going to tech school and taking chassis fab, we were basically welding all day every day for weeks on end. But it was the middle of summer with no AC in the shop, and fans would blew the gas away from the weld and ruin it. So we often didn’t wear welding jackets. Yeah, we got the usual little pock mark burns from sparks, but after a few days we started getting sun burnt too. Putting sun screen on before class took care of that real fast.