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- Jun 18, 2019
U.S. Riots of May 2020 over George Floyd and others - ITT: a bunch of faggots butthurt about worthless internet stickers
- Thread starter snailslime
- Start date
- Status
I am seriously thinking about going to the Portland protests tonight. I'm aware of the risks but feel I will regret it if I don't go and actually watch what's happening.
Getting tard comed
kiwifarms.net
- Joined
- Dec 17, 2019
Is there a reason media people seem to think they are exempt from retaliation when they are apart of the group being retaliated upon? This entitlement from everyone is really strange, from the people actually antagonizing feds, to moms, to "media" people. Maybe you have to feel that way be out there in the first place but isn't it generally understood if you go into a warzone you have a chance of getting shot?
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- Apr 5, 2018
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- Jun 21, 2020
To use the language of the protesters: Journos get the bullet, too in Minecraft.“I’m media! I have a camera! This is press on this corner!”
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- Jul 18, 2017
They got the beating sticks out.
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- Sep 18, 2018
Hes legit as far as he is smart enough to comply with police orders and staying out of it. Antifa fucked him over because they lined up behind him and his buddies durning a police push though.Flashbangs in Seattle on the Woke stream. Guy very surprised flashbangs are coming at him: “I’m media! I have a camera! This is press on this corner!”
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Ah, if he’s actually legit then cool
cop was more then happy to mace the people behind them though. 10/10 Service right there.
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- Dec 25, 2019
Water cannon. It's time.
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- May 16, 2019
One of them sprayed pepper spray directly into a blocking umbrella on the front line. The protester cursed at him. So another cop reached forward, snatched the umbrella and broke it, so the 1st cop got a full face spray on the protester. It was beautiful to see, I'll try and grab a clip when stream renders.
benutz
kiwifarms.net
- Joined
- Mar 2, 2020
I just spent the last 4 or 5 hours of my life replying to you and one or two others about this laser shit.
It was a real effort poast. My greatest ever on the farms. Unfortunately it got eaten up by the farms that giveth and also taketh away. I got too cocky. KF works too well most the time. I should have backed up before posting. I'm still wanting to neck myself over it. Oh well. Fucking LOL.
Anyway, I did a bit of brushing up on my laser knowledge. It was genuinely shocking what I found and to be honest it's prolly better I don't poast.
I remember pointing out something you said that was wrong, and I then provided the proof to why that was so, but hey, maybe I just misunderstood what you were trying to say.
When KF ate my poast, it kept the other half, but I deleted that out of spite to myself for being such a stupid cunt and not backing up before posting. I'm still seething, literally shaking and throwing up in my mouth a little bit...
Deep breath...
You can buy 50,000mW Class IV lasers on the net for a coupla hundred bucks. They fit in your hand. They are the size of a Maglite. They are illegal in US/UK as is anything above a Class 3a laser, which is 5mW. They cause immediate permanent blindness and fit in your trouser pocket and palm of hand. They are illegal but you can still buy them.
You obviously have some experience with lasers, probably even more than me, I'm just not exactly sure what your point is.
It's academic anyway, as a pen laser can cause eye damage and temporary blindness. Even permanent blindness. This isn't stuff worth pissing over, it's basic scientific fact, to anyone who cares.
You were responding to this post:
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Proliferation of green and blue DPSS and diode lasers really is scary in protests when you think about it. These chinese green and blue lasers might usually have terrible beam quality, but they're still Class 4 and can cause some serious damage. If you wanna be really insidious, you can take apart a green laser and just use the even more powerful IR part of the laser before frequency doubling to have an invisible blinding beam. Gotta add some optics, though, and better be careful. You can see the beams (or rather, the spots) using a phone cam, they usually have shitty IR filtering.
There's a protocol on blinding laser weapons in the Geneva Convention, but it's mostly about laser weapons specifically designed to cause blindness. Article 2 states that when using other lasers (like targetting lasers), causing injuries must be minimized. Using non-weapons lasers to cause blindness surely falls under that somewhere.
It was made up in 1995, and since then laser technology has made quite a lot of progress. Especially in handheld devices (no, actual laser "rifles" won't be a thing anytime soon, but laser CIWS are in deployment, as far as I know).
/edit:
Btw., due to so many "laserpointers" in the green and blue spectrum now being basically Class 3 and 4 lasers, now pretty much every company here in Germany needs to have a laser safety supervisor appointed as soon as they even have a basic bitch laser pointer.
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Proliferation of green and blue DPSS and diode lasers really is scary in protests when you think about it. These chinese green and blue lasers might usually have terrible beam quality, but they're still Class 4 and can cause some serious damage. If you wanna be really insidious, you can take apart a green laser and just use the even more powerful IR part of the laser before frequency doubling to have an invisible blinding beam. Gotta add some optics, though, and better be careful. You can see the beams (or rather, the spots) using a phone cam, they usually have shitty IR filtering.
There's a protocol on blinding laser weapons in the Geneva Convention, but it's mostly about laser weapons specifically designed to cause blindness. Article 2 states that when using other lasers (like targetting lasers), causing injuries must be minimized. Using non-weapons lasers to cause blindness surely falls under that somewhere.
It was made up in 1995, and since then laser technology has made quite a lot of progress. Especially in handheld devices (no, actual laser "rifles" won't be a thing anytime soon, but laser CIWS are in deployment, as far as I know).
/edit:
Btw., due to so many "laserpointers" in the green and blue spectrum now being basically Class 3 and 4 lasers, now pretty much every company here in Germany needs to have a laser safety supervisor appointed as soon as they even have a basic bitch laser pointer.
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You can buy a Class IV laser for a couple of hundred bucks. Fits in your hand. Runs on batteries. Causes permanent blindness should it hit the eye. They tend to be Blue and Green but some are also Red as well. I covered this in my lost post as to why this is. It's not important.
I’ve seen class IIIa’s in industry and they use a lot of power.
Again I'm going to question what you are saying. Class IIIa's are legal to buy in the US/UK and they run off a couple of small batteries. They can still blind you though. They only cost a few bucks. You can buy Class IIIb lasers for 30 bucks and they are like 500mW - a 100 times more powerful.
The company that sells them is on the internet and they ship worldwide (free postage). They come up in the first google search. I think this stuff is illegal to own but not illegal to buy. Obviously.
Class I
Inherently safe; no possibility of eye damage. This can be either because of a low output power (in which case eye damage is impossible even after hours of exposure), or due to an enclosure preventing user access to the laser beam during normal operation, such as in CD players or laser printers.
Class II
The blink reflex of the human eye (aversion response) will prevent eye damage, unless the person deliberately stares into the beam for an extended period. Output power may be up to 1 mW. This class includes only lasers that emit visible light. Some laser pointers are in this category.
Class IIa
A region in the low-power end of Class II where the laser requires in excess of 1000 seconds of continuous viewing to produce a burn to the retina. Commercial laser scanners are in this subclass.
Class IIIa
Lasers in this class are mostly dangerous in combination with optical instruments which change the beam diameter or power density, though even without optical instrument enhancement direct contact with the eye for over two minutes may cause serious damage to the retina. Output power does not exceed 5 mW. Beam power density may not exceed 2.5 mW/cm2 if the device is not labeled with a "caution" warning label, otherwise a "danger" warning label is required. Many laser sights for firearms and laser pointers commonly used for presentations are in this category.
Class IIIb
Lasers in this class may cause damage if the beam enters the eye directly. This generally applies to lasers powered from 5–500 mW. Lasers in this category can cause permanent eye damage with exposures of 1/100th of a second or more depending on the strength of the laser. A diffuse reflection is generally not hazardous but specular reflections can be just as dangerous as direct exposures. Protective eyewear is recommended when direct beam viewing of Class IIIb lasers may occur. Lasers at the high power end of this class may also present a fire hazard and can lightly burn skin.
Class IV
Lasers in this class have output powers of more than 500 mW in the beam and may cause severe, permanent damage to eye or skin without being focussed by optics of eye or instrumentation. Diffuse reflections of the laser beam can be hazardous to skin or eye within the nominal hazard zone. (The nominal hazard zone is the area around a laser in which the applicable MPE is exceeded.) Many industrial, scientific, military and medical lasers are in this category. Many handheld lasers ("laser pointers") at this output level are also now available in this category.
Class IIIa:
These are legal, can be bought for 5 bucks and run on a couple of small AA batteries.
Hardly they use a lot of power, to quote you once again.
I'm sorry, I just don't know what your point is as you only are giving out one liners and the odd paragraph. I'm writing fucking essays here man, and the farms just fucking gobbled it up...
LOL.
....
Ho Lee Fuck. Kiwifarms remembered the first half of my lost post after logging back on. I'll post it why not. Here it is:
Lasers operate in a narrow band of the spectrum. But there are many types, and the substances used to stop them have wider bands cutting out sections of the spectrum. And many types of laser.
View attachment 1471370
So yeah, goggles made of literally the blackest substance you've ever seen. Why not look good if you have to stumble around sightless like a fool either way.
CB4 I'm Black Y'all
www.youtube.com
Lasers operate in a narrow band of the spectrum.
Very much so. And that was my point - that the human eye only perceives a fraction of that again. So damage can occur outside of visible frequencies, hence me quoting my experience with YAG lasers (outside the EMS for humans). At least the visible spectrums are picked up on by the eye and therefore the blink response can avoid permanent damage when dealing with a Green or Red or Blue laser. YAG transmits outside that range.
But that doesn't meen Green pen lasers are harmless. They can be very dangerous in fact, and here is why:
Laser safety - Wikipedia
en.wikipedia.org
For example, some people exposed to high power Nd:YAG laser emitting invisible 1064 nm radiation may not feel pain or notice immediate damage to their eyesight. A pop or click noise emanating from the eyeball may be the only indication that retinal damage has occurred i.e. the retina was heated to over 100 °C resulting in localized explosive boiling accompanied by the immediate creation of a permanent blind spot
I'd be interested to see a high-res image of what you posted there. It looks interesting but I can't make out what it is supposed to represent exactly. If it is Laser frequencies then it may not be totally accurate because you can get X-Ray lasers - https://en.wikipedia.org/wiki/X-ray_laser - that doesn't seem to be represented there in the chart. I probably just read it wrong (my eyesight isn't perfect even with glasses).
As for the safety goggles thing, well yeah, it stands to reason that if you want to block a particular laser frequency then some other frequencies must be let through otherwise you are blocking all visible electromagnetic radiation. Wouldn't hurt to block the non-visible as well for reasons just quoted above.
Laser safety - Wikipedia
en.wikipedia.org
Protective eyewear in the form of appropriately filtering optics can protect the eyes from the reflected or scattered laser light with a hazardous beam power, as well as from direct exposure to a laser beam. Eyewear must be selected for the specific type of laser, to block or attenuate in the appropriate wavelength range. For example, eyewear absorbing 532 nm typically has an orange appearance (although one should never rely solely on the lens color when selecting laser eye protection), transmitting wavelengths larger than 550 nm. Such eyewear would be useless as protection against a laser emitting at 800 nm. Furthermore, some lasers emit more than one wavelength of light, and this may be a particular problem with some less expensive frequency-doubled lasers, such as 532 nm "green laser pointers" which are commonly pumped by 808 nm infrared laser diodes, and also generate the fundamental 1064 nm laser beam which is used to produce the final 532 nm output.
This last paragraph really is very important.
Not all lasers are made equal. Some even utilise serious health-hazard cost-cutting measures to get that price down to 3 bucks a pop.
Frequency doubling.
Green light transmits in the 532nm range. 1064nm is outside the visible spectrum for humans and hence why it is called infra-red. So if those lasers are pumping out at that frequency as well, then the human eye can not 'see' it and does not have the normal 'aversion' response and it can cause eye damage.
Note as well that safety goggles that reflect Green light have an Orange tint to them.
Just like when the human eye perceives Green light, it isn't actually seeing Green light in absentia of all other wavelengths. What it is perceiving is all light in the visible electromagnetic spectrum, except for Green light! And we call that phenomenon 'observing the colour Green'. But I digress. I've studied Optics in several different disciplines for a while now, and while I still only have a layman's understanding, it's still an extremely fascinating subject to me.
Back to frequency doubling and why Green laser pointers should be taken very seriously. I'm typing this shit out because they can cause permanent damage.
This article describes it better than I ever could:
The Danger Of Green Laser Pointers
Cheap green laser pointers can emit dangerous levels of infrared radiation, according to an investigation carried out by physicists in the US
The article is 10 years old now, and laser tech will have moved on even further. More and more lasers being (ironically) made in China and with the ever ensuing cost cutting measures. Cost cutting is not good in laser safety.
This paragraph resonates with the one I quoted earlier from wikipedia:
These devices create coherent green light in a three step process. A standard laser diode first generates near infrared light with a wavelength of 808nm. This is focused onto a neodymium crystal that converts the light into infrared with a wavelength of 1064nm. In the final step, the light passes into a frequency doubling crystal that emits green light at a wavelength of 532nm.
Frequency doubling. And why it's dangerous.
They removed the filter to take out the infra-red eye-damaging portion of the electromagnetic radiation.
Today, Jemellie Galang and pals from the National Institute of Standards and Technology and the University of Maryland say they’ve found worrying evidence that the output of some green laser pointers is much higher and more insidious. They describe one $15 green laser pointer that actually emits ten times more infrared than green light.
Galang and co are under no illusion as to the potential consequences of this. “This is a serious hazard, since humans or animals may incur significant eye damage by exposure to invisible light before they become aware of it,” they say.
It's all in the article I archived above.
So, basically, those Green Laser pointers are quite dangerous. And the cheaper the pointer, the more potentially dangerous it is. It really has fucking pissed me off seeing these twats shining them in the police's faces. The only good thing is they do contain some visible Green light, so that will cause the aversion and blink response by itself, but still, it's offloading a whole lot more of a much more damaging wavelength at the same time. I don't imagine any of this is any different for Red or Blue lasers either that use frequency doubling without the filters.
It's not the colour of the laser you need to worry about, though Blue ones do tend to be more powerful than others, it's whether it is poorly made and pumping out infra-red. Thankfully you wouldn't really get one of those pen/pointers that wasn't pumping out visible spectrum as well, so that does mitigate it somewhat, but still.
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- Jul 18, 2017
Seriously, get into this stream guys. I have not laughed this hard in weeks.
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- Mar 14, 2014
Dunno if said yet but Obama actually was the one who did all the work for this.
Like he was the one who said Russia isn't our enemy, made Iran Deal, got ridof anti-fracking laws, kept Assad around, and signed into law stuff for police to kidnap people.
Jared Kushner wanted Felons to vote and worked with George Soros to make it happen cause he funds Progressive causes. Google that was so with Obama that a special watchdog website was created to report on Google visits to the WH is what funds the Federalist Society that ruled can't vote.
https://thehill.com/regulation/cour...to-reinstate-vote-of-nearly-1-million-florida
https://slate.com/news-and-politics/2020/07/supreme-court-florida-felons-poll-tax.html
https://www.foxnews.com/politics/scotus-florida-law-requiring-felons-fees-voting
Everything is cause of Obama.
Like he was the one who said Russia isn't our enemy, made Iran Deal, got ridof anti-fracking laws, kept Assad around, and signed into law stuff for police to kidnap people.
Jared Kushner wanted Felons to vote and worked with George Soros to make it happen cause he funds Progressive causes. Google that was so with Obama that a special watchdog website was created to report on Google visits to the WH is what funds the Federalist Society that ruled can't vote.
https://thehill.com/regulation/cour...to-reinstate-vote-of-nearly-1-million-florida
https://slate.com/news-and-politics/2020/07/supreme-court-florida-felons-poll-tax.html
https://www.foxnews.com/politics/scotus-florida-law-requiring-felons-fees-voting
Everything is cause of Obama.
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- Dec 25, 2019
4 Selous scouts who would take offence to being called "uncle Tom" and "coon", I'd say.
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- May 16, 2019
"I got hit with a flashbang right between my legs, and it don't feel good when you're wearing shorts." Poor Omari took a rubber bullet, too.
Now he's saying cops are bringing up more munitions and reloading. This was something I was wondering about earlier, whether Seattle and Portland cops might be running out of munitions so they needed to conserve. Doesn't seem to be the case in Seattle, at least. Proves the cops can push back the large crowds when they're allowed to.
Now he's saying cops are bringing up more munitions and reloading. This was something I was wondering about earlier, whether Seattle and Portland cops might be running out of munitions so they needed to conserve. Doesn't seem to be the case in Seattle, at least. Proves the cops can push back the large crowds when they're allowed to.
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- Feb 24, 2019
That's the first time I've seen that image, and I must say, it's strange how even though it's supposed to be libertarians, it's not a half bad depiction of the "swinging of the pendulum" phenomenon as a whole.
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- Feb 28, 2019
... Fentanyl?
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- Dec 25, 2019
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- Jun 13, 2019
Too prevalent in the suburbs.
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- Sep 21, 2019
I wish evangelical outreach wasn’t mostly represented by this dude out here screaming about the bible, god bless him for trying. Most people think streetcorner preaching is creepy and most real evangelism takes place through real relationships.
I like hearing things I agree with in all the madness, but I’m not the target of this guy’s message.
I like hearing things I agree with in all the madness, but I’m not the target of this guy’s message.
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- Feb 28, 2019
"We need to talk, but only my side can speak, you have to be silent and listen, we can only talk about topics that I decide are acceptable, and in the end you have to agree to obey me fully for the rest of your life."
That's not a talk. That's not a conversation.
That's a lecture. Or ransom demands.
And I'm not particularly interested in getting a lecture from oversocialized and indoctrinated Marxist terrorists who don't even know what bathroom to use. The only thing I want to hear from them is the names of their co-conspirators, which I'll happily hear during the waterboarding process.
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