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Green lasers. Not the first time ive seen this sort of thing. Green lasers are made by running an IR laser through a crystal that doubles thier frequency, shi
by sandworm101 3y ago
Green lasers. Not the first time ive seen this sort of thing. Green lasers are made by running an IR laser through a crystal that doubles thier frequency, shifting IR into what we see as green light. But go cheap on the crystal and a green laser pumps out invisible IR possibly in a slightly different direction than the visible beam. Your eyes dont even blink because they dont see the IR. You dont notice the damage and simply think it a headache.
See an eye doctor asap and tell them you were exposed to a high power green lasers. They cannot fix things, but better you learn about any new blind spots before you drive a truck.
- hunter2_ 3y agoWhy is everyone else only talking about UV? Unfortunately I can't access TFA in its entirety so maybe it discusses both?
- rideontime 3y agoSource for "green lasers"? All the reporting I've seen says that they used disinfectant-grade UV lamps as blacklights. https://twitter.com/atomicthumbs/status/1721602536225091716 https://twitter.com/atomicthumbs/status/1721602536225091716
- sandworm101 3y agoThe footage ive seen had a few green lasers scanning. UV causes cornia damage, but not the headaches. IR lasers cause headaches, strange pains that the body doesnt understand and get interpreted as headaches. If this was only UV, most anyone wearing glasses should have been protected as most modern glasses have substantial UV protection. IR protection is more rare in eyewear, although rather common in automotive glass.
- hunter2_ 3y agoSo when I roll down a car window and feel the radiant heat of the sun more intensely than when the window is up, is that difference primarily due to the glass filtering UV or IR?
- sandworm101 3y agoMuch automotive glass filters (reflects) IR, and also absorbs UV. Each UV ray is "higher energy" but the sun pumps out vastly more IR than UV. You cannot immediately feel the UV on your skin, not until it gives you a sunburn. You are feeling the IR that was previously blocked by the automotive glass. Interestingly, glass on military vehicles generally does not filter IR. You need IR if you ever want to use nightvision equipment.
- bigiain 3y agoHere's some informed speculation and commentary/explanation from a radiation safety expert: https://www.funraniumlabs.com/2023/11/ultraviolet-rant/ https://www.funraniumlabs.com/2023/11/ultraviolet-rant/ "Having now had a chance to take a look at the likely culprit, assuming a repetition of the previous incident, all I can say is You Completely Irresponsible Fucks. I am having flashbacks to yelling at Naomi Wu for irresponsible deployment of germicidal UV designs in 2020."
- qwertox 3y agoI'm currently limited to mobile, so I don't have he link. Yesterday I got recommended a green laser at freezing temp YouTube video which was interesting. Basically at low temps green lasers are no longer visible because they shift to strong uv light, this includes Christmas decoration lasers which people put in front of their houses. So you think it's off, but it may be cooking your eyes. So I guess that if they used some shady lasers at the party, it's entirely possible. I think I also burned my eyes a bit while tinkering with LEDs, I had a pain in them and since then see bad at night. I avoid watching into LEDs at any cost since then.
- MobiusHorizons 3y agoThe article seemed to suggest UV not IR before the paywall cutoff. Is this from the article or are you speculating?
- sandworm101 3y agoIt is clear that these morons didnt understand anything about stage lighting risks. They obviously just went with whatever light sources gave the best bang for the buck. Cheap green lasers, cheap high-power UV lamps, no respect for best practices. I bet that a close look at the stage structure would reveal other shortcomings too.
- deleted 3y ago[deleted]