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Where are you getting 10 watts from? The page says 1-5 mW.
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Aug 11, 2019 05:27
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but this rave is in an abandoned warehouse and that's an enclosure so we're good
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Aug 11, 2019 05:28
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And the kind of damage that a laser does to your retina is something the brain is really good at filtering out until enough of it builds up that it can't keep up and you basically go blind overnight.
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Aug 11, 2019 05:35
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Double Punctuation posted:Where are you getting 10 watts from? The page says 1-5 mW. https://www.aliexpress.com/
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Aug 11, 2019 05:41
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Sagebrush posted:No, a 10 watt laser pointer is not okay I got a nice letter from the authorities when I was trying to import some lasers that were randomly checked and over the raiting they were advertised as. I don't remember the details but long story short they thought I was trying to dupe the importation laws or something.
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Aug 11, 2019 05:51
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They seem to have legit laser engraver lasers too https://www.aliexpress.com/item/32961739730.html This rave is gonna be so lit
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Aug 11, 2019 05:54
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"The Action Lab" guy will be blind soon enough if he keeps doing this with his 1.4 Watt laser. You only need to see the first 20 seconds to understand. https://www.youtube.com/watch?v=Kr5DYnqVAWs
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Aug 11, 2019 06:09
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Rexxed posted:"The Action Lab" guy will be blind soon enough if he keeps doing this with his 1.4 Watt laser. You only need to see the first 20 seconds to understand. I love the untinted safety glasses. I controlled for the hazards with PPE! 
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Aug 11, 2019 06:12
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haveblue posted:0.5 watts is the point at which eye protection is required because even momentary or reflected exposure can cause permanent eye damage, and sustained exposure can burn skin and common materials. This is also the point where the laser classification tiers just give up and say "here and above is maximum danger, take all precautions". 10w in, but what wattage of photons actually coming out?
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Aug 11, 2019 06:45
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The Lone Badger posted:10w in, but what wattage of photons actually coming out? If it’s much less than 10 Watts, you’d figure it out pretty quick just by holding it.
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Aug 11, 2019 07:20
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so it turns out that laser pointers from ebay that claim to be 5mw are actually several times that https://www.youtube.com/watch?v=-2crWR1lg6s
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Aug 11, 2019 07:46
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Don't worry, AliExpress has you covered for PPE too!   You can even find those same "laser safety glasses" for less than a dollar, with free shipping from some sellers.
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Aug 11, 2019 07:49
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Grundulum posted:If it’s much less than 10 Watts, you’d figure it out pretty quick just by holding it. It usually is. These things dissipate absurd heat. That three watt one that came out like a decade ago and kicked off a furor was the size of a d-cell Maglite and it was 90 percent heatsink.
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Aug 11, 2019 11:40
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Aug 11, 2019 12:37
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haveblue posted:0.5 watts is the point at which eye protection is required because even momentary or reflected exposure can cause permanent eye damage, and sustained exposure can burn skin and common materials. This is also the point where the laser classification tiers just give up and say "here and above is maximum danger, take all precautions". so get a security cam system with long lens, facial recognition software trained to detect and aim at people wearing black helmets, and mount the Eye Fucker on a remote controlled gimbal with targeting set by the security cam. Hobbyists already make NERF turrets on Github that can do this, step your game up Hong Kong protesters
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Aug 11, 2019 14:01
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BMan posted:so it turns out that laser pointers from ebay that claim to be 5mw are actually several times that Ahhhhhhh, the bit where he points a laser directly into his eyeball.  I genuinely threw my arms in front of my eyes in reflex. edit: https://www.youtube.com/watch?v=DMVWW-bmKwQ These are scary af, especially the part where they'll advertise them as "great for playing with your cat" Beartaco fucked around with this message at 14:21 on Aug 11, 2019 |
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Aug 11, 2019 14:10
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bring back old gbs posted:so get a security cam system with long lens, facial recognition software trained to detect and aim at people wearing black helmets, and mount the Eye Fucker on a remote controlled gimbal with targeting set by the security cam. https://www.youtube.com/watch?v=Q8zC3-ZQFJI Close enough!
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Aug 11, 2019 15:05
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Reign Of Pain posted:I used to drive a '77 Chevy "sports" Van and the roof was indeed solid AF but I dunno if it could handle that kinda weight...especially when when you go over another road at a intersection that has not been leveled properly....that gonna cause the roof to kerlapse and mush a fella! Honestly given the general condition of the van, I’d be more concerned that it’s almost certainly on four completely bald tires, has no remaining soft materials anywhere in the front end, tie rod ends that are holding on mostly by hope, and four completely blown shocks.
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Aug 11, 2019 15:16
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Does this count as OSHA? https://twitter.com/Leozaur/status/1160176611305623557
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Aug 11, 2019 15:30
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BMan posted:so it turns out that laser pointers from ebay that claim to be 5mw are actually several times that In addition to the lasers just being more powerful than specified, there are other effects making those eBay ones even more dangerous. First, blue lasers in particular are more dangerous than other colors because the human eye is less sensitive to blue light. Given red, green, and blue lasers of the same output power, the blue one will appear much weaker and "safer" than the others but it's not. Second, while it is possible to make a diode that lases directly in the green or blue range, it's not cheap. A less expensive strategy is to make a high-power infrared laser diode that lases at say 1064nm, and use that to pump a frequency doubling crystal that produces green 546nm laser light. This process is only about 15% efficient, so to get even 5mw of light output you need 30mw of infrared. This means that there is a dangerously powerful infrared laser in the optical path. A well-designed laser will have a high-pass filter that absorbs any leaked infrared light, leaving only the low-power optical beam...but those filters also cost money and you can't tell if they're there without the right detectors so the bargain-basement lasers often leave them out. As a result your "eye-safe" green laser may have a halo of powerful infrared light scattered around its beam, but your blink reflex can't protect you from it and it's invisible so you'd never know it's there and you're not looking directly into the green beam so what's the danger? The import restrictions on laser pointers really aren't just to ruin your fun.
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Aug 11, 2019 15:56
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Sagebrush posted:In addition to the lasers just being more powerful than specified, there are other effects making those eBay ones even more dangerous. well that's horrifying.
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Aug 11, 2019 16:09
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Also infrared lasers aren’t blocked or absorbed by the lens or aqueous humor in your eye so they’re more likely to burn your retina, causing permanent spot blindness! Or if it hits the optic nerve, total eye blindness!
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Aug 11, 2019 16:38
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Bees on Wheat posted:Don't worry, AliExpress has you covered for PPE too! This probably has the same problems as the pointers where corners are cut and without additional testing, there's no way to know if they're actually protecting you.
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Aug 11, 2019 17:48
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StarMinstrel posted:Does this count as OSHA? Wall full of awards from the internet, doesn't understand the basics of electricity. I am sure that is a biting comment on something.
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Aug 11, 2019 17:49
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itskage posted:This probably has the same problems as the pointers where corners are cut and without additional testing, there's no way to know if they're actually protecting you.
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Aug 11, 2019 18:36
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itskage posted:This probably has the same problems as the pointers where corners are cut and without additional testing, there's no way to know if they're actually protecting you. The goggles, they do nothing!
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Aug 11, 2019 19:35
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MRC48B posted:Not obsolete, just too expensive and risky. Something like Pluto would be piss easy to intercept. It would be trundling along very slowly (compared to an ICBM) in the thickness of the atmosphere and glowing white hot on all sorts of wavelengths. The speed doesn't even matter, it's going to be so hot even from the front that you can just shoot it head on with something slower. Or from behind with something faster. Also the INF treaty was mostly about getting rid of the kind of nuclear weapons that would have been delegated to relatively low-level commanders to use in a limited nuclear war between NATO and Warsaw Pact forces.
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Aug 11, 2019 19:52
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Thomamelas posted:The proper name for a group of SWIFT trucks is a Collision of SWIFT trucks. Actually it is a Jackknife of SWIFT trucks.
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Aug 11, 2019 20:46
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cyberbug posted:Something like Pluto would be piss easy to intercept. It would be trundling along very slowly (compared to an ICBM) in the thickness of the atmosphere and glowing white hot on all sorts of wavelengths. The speed doesn't even matter, it's going to be so hot even from the front that you can just shoot it head on with something slower. Or from behind with something faster. Tomahawks don't seem to be that easy to shoot down. Pluto doesn't fly in the atmosphere. It flies supersonic near the ground so it would very hard to shoot down.
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Aug 11, 2019 21:24
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Saukkis posted:Tomahawks don't seem to be that easy to shoot down. Pluto doesn't fly in the atmosphere. It flies supersonic near the ground so it would very hard to shoot down. Atmosphere starts from ground level, its first and densest layer is known as troposphere. 
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Aug 11, 2019 21:43
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Rexxed posted:"The Action Lab" guy will be blind soon enough if he keeps doing this with his 1.4 Watt laser. You only need to see the first 20 seconds to understand. Is it wrong that this makes me want one more?
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Aug 11, 2019 21:55
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chitoryu12 posted:Is it wrong that this makes me want one more? Mmm yea, a little. /Thor
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Aug 11, 2019 22:15
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Nenonen posted:Atmosphere starts from ground level, its first and densest layer is known as troposphere. No no, it flies below the atmosphere. You mean in a different layer of the atmosphere? No, it's below it. There's nothing down there. Nothing? No. Just a few birds. And buildings, and air molecules. And? And about five tons of white hot supersonic cruise missile.
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Aug 11, 2019 22:33
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Shut up Meg posted:Wall full of awards from the internet, doesn't understand the basics of electricity. They're one of the biggest Goon success stories, so just channelling their inner Grover.
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Aug 11, 2019 22:51
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Inner Grover, Outer Grover, don’t they become one and the same at some point?
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Aug 11, 2019 23:10
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Sagebrush posted:In addition to the lasers just being more powerful than specified, there are other effects making those eBay ones even more dangerous. That 1064nm wavelength is the perfect wavelength to absolutely ruin retinas. There's no overstressing or hyperbole when talking about how dangerous that wavelength is when it comes to eye safety.
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Aug 12, 2019 00:46
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Wingnut Ninja posted:No no, it flies below the atmosphere. So the allegations that these are just made to carry as much nuclear material as possible and to hell with the consequences, I mean that’s ludicrous...
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Aug 12, 2019 00:51
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Mustached Demon posted:That 1064nm wavelength is the perfect wavelength to absolutely ruin retinas. There's no overstressing or hyperbole when talking about how dangerous that wavelength is when it comes to eye safety. Get a 510–520 nm LASER. They’re not just safer. They also keep working when it gets colder than San Francisco in the summer (i.e. fifteen degrees Celsius).
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Aug 12, 2019 00:56
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Platystemon posted:Get a 510–520 nm LASER. I used a Nd:YAG back in college for pump-probe scienceing. Real useful wavelength just by itself.
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Aug 12, 2019 01:04
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Aug 12, 2019 01:18
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