you're music is awesome!

so can you give us links to some cheaper but with IR light filter lasers or can we just tape one on laser itself

I was thinking that might be a way to deal with some lighting effect projectors that have green lasers in them that may or may not be safe..

XM360 sent me here ... and now you have a new sub :-)

Er du fra Danmark. Det lyder sådan på din accent

Good to know it wasn't in the center of your retina, but still a clear example of the seriousness of this issue. Thanks for sharing your story.

My "

soupisgdfood: I recall popular KZfaqr "PHOTONICINDUCTION" was playing with lasers and accidentally burned his camera's image sensor. So lucky it wasn't his mate's eye. A classic reminder of this accident is his MANY subsequent videos in which WE SEE DEAD SPOTS IN THE IMAGE! The guy is a pro, but one moment in time is all it takes, as you discovered. Thanks for sharing. Maybe I'll buy the expensive eye protection if my neighbors kids show up with lasers.

Also the crystals used in 532nm lasers lose their properties at low temperatures. 0°C is enough to make the laser appear as if it's not working any more, but it actually still works and emits only IR. This is very dangerous because people will sometimes try to confirm that the laser is not working by looking directly into it. More people should know about this, would be nice if you made a video about this effect.

+Francois Deshue how are you typing?

ok mr krabs

These pies arent homemade. They were made in a factory. A bomb factory. They're B O M B S

This cave is not a natural formation

well said

Alucard Pawpad 🤣🤣genius example with the landmine. gg

This is dangerous not funny

@@lightbulb8888 Lighten up maybe?

@@astrick1768 AHAHAH

another problem is with focal length. Lasers usually aren't perfectly 100% uniform, it's just their focal length is so far that it usually looks uniform to people relatively close to it's emission. This means that, say, over a few hundred or thousand meters, what looks like a thin beam to you can actually be a wide cone of laser radiation that can also cause severe glare on the plane windshield in addition to the normal laser damage

This was the very first thing my brother warned me about. I had a cheap red laser and was playing with it and he said don't ever point it at a plane. I didn't know the reason why, but I knew to not do it.

old gregg "most aircraft simply think they're being targeted by missiles" What? That's just ridiculous. Pilots are not afraid of missiles because 99.9999% will never encounter them. "I find it hard to believe that a common low power red laser pointer (almost the only kind you'll see the idiots that point it at planes own), can actually cause you to lose your depth perception." Ah yes, the argument from personal incredulity. I've known many pilots who have experienced encounters with lasers at night, and I trust their experienced testimony over your armchair speculation. Did you even read the comments above? It seems to me that a pilot flying at night is an entirely different situation from "a child walking through school."

old gregg I'm not really sure what you're on about. If this is some kind of exercise in absurdist humor for your own gratification, then be my guest and continue to make the meta-modernists proud. No, small aircraft aren't generally equipped with warning systems for targeting lasers. Such a system would also be quite useless for visible lasers because the pilot would know immediately that they were being pointed at with one. "a high powered laser would probably make a cessna crash if you pointed it at them long enough" The duration should not affect probability of a crash, as the pilot would immediately avert their eyes as soon as they realized they were being flashed. The temporary blindness would then prevent them from flying properly, as they could no longer see the instruments or the outside. This should wear off in at most a few minutes as long as their eyes weren't permanently damaged, but in the meantime the pilots might make some critical error due to an inability to properly fly the aircraft.

@@OlGregge hi man. Look, i will post a link to a video that The Wall Street Journal did. About the laser danger. And while a simple red laser isn't that dangerous, people use most the green ones. kzfaq.info/get/bejne/l9V5ldWS25bGZoU.html

Oh, i did exactly that

My cheap green laser did this to me when i dropped it. speck of white powder came out the lens and noticed it still melted electrical tape without the visible beam. As much as I love stealthy, invisible things, this was clearly way too dangerous to keep. Disassembled and recycled. Please people do not try to save a buck, go with a different color or go with a higher grade!

I ended up doing this as a kid. Now several years later I've known why.. and I kick myself every time I see talk of it.

wow! do you have any noticeable eye damage? that horrible

Chris Perry Just hit it with a sledgehammer

Aaron Greenfield I see what you did there

Aaron Greenfield well played

Aaron Greenfield *clap clap* well done sir well done

I did not realise the seriousness of these green laser pens(as none of them that people have will be correctly filtered due to cost of a legitimate one) , next time I see people playing with them by pointing them at cars (like mine) , screw the delivery I am on, the police are going to be there before I leave to make sure they are arrested (guess this is why aeroplane pilot get blinded by them and get permanent eye damage, its not the green light that's the issue it's the light you can't see)

@@seanclements6206 Or did you?

Naruto saves goku in big time regular...

There are also the side-lobes caused by diffraction.

Hey, noscope, isn't it funny the retards claim that gender is a social construct and shouldn't dictate how they behave, THEN THEY GO ON TO INVENT 32230402 GENDERS THAT DICTATE HOW YOU SHOULD BEHAVE

"Doing science the proper way". Yeah my ass

That's right. Nerdy ≠ boring.

It is not a 2.5 watt green laser. The diode is 2.5 watt, but by time it exits as a filtered 532NM green laser, it is below .5 watt peak output.

Stare at it long enough, and it wont LOOK scary at all

Just take care that the laser doesn't look back at you.

You’ve obviously hav never heard of styropyro, he made a 5000 mW blue lazer

I dont remember what color it was but styropyro built A 100 WATT HANDHELD LASER JESUS 20000x more powerful than safety limit of 5 milliwatts

thankfully this fad fell off rather quickly. it's been years since i saw a laser

Damn i think i mightve messed my eyesight from these things, where i went on holidays as a kid sold these green lasers and i had one for like 2 years was powerful as fuck and im sure the beam entered my eye a few times. I figured since they were sold on the street they were safe

Rob Spagrenetti damn

Yo Day its not that bad or anything i can still see pretty well its just now that i think about it before i got that lazer i had almost perfect vision and then after i would have to squint to see the writing on the blackboard in school

oh ,Fair enough then . I hope that you got yourself checked from the doctor.

Nah, if you're that stupid that you look straight into a laser you probably deserve what's coming for you.

The bigger issue is that you could still get blasted by IR even if it's not been directly pointed at you (house windows with reflective heat coating) as you don't know you have to assume all green lasers are unsafe unless tested (as markings on them are meaningless) and if they are cheap

Yea, but children aren't even supposed to have lasers, simple as that. No parent should allow a child to even own something remotely close to a laser, it's literally asking for trouble if that's the case.

Avana Stupid people deserve to go blind? I don't know about you, but I'd rather society have to deal with a stupid person who can see and maybe work a menial job than a stupid person who can't see and requires lifelong financial assistance from the government.

Darwinism, natural selection. Stupid people do stupid things and get what's coming to them. If that causes their death or permanent incapacitation, that just means less stupid people. Having said that, though, I don't agree that naive children should be penalised for being just that - naive. They don't know the risks of playing with such an item so the responsibility shouldn't be theirs. Parents shouldn't allow children to use lasers, simple as that. Just the same reason you wouldn't trust a baby to hold a live firearm.

Oh well, thanks for that information! That would make this even more dangerous, as you might not really expect that (if not mentioned by the seller or where ever). :-/

​@@Reaper035​ Hey, this is one of the most important threads, it's so underrated. I swear this would have found me too. Imagine shining the laser at it while standing behind expecting IR to be blocked. Woah!

LtKernelPanic hey I've been looking everywhere for advice on my laser, it's a 405 1000mh I think and I reversed the polarity on it first day because I'm an amateur, what would I need to repair it? Or do you think I should just buy a new one?

Be honest, is the possibility of hurting you really going to dissuade him?

You need to beat his arse and destroy his laser.

That's not good sea turtle

@tinylilmatt I agree with ya man. All these people hurumph hurumphing over the danger of a green laser when a crazy person can buy a hand gun, don't see anybody hurumphing over something that can put a hole through someone's head. But ya kids shouldn't be able to have lasers. I remember shining a red laser pointer into my eye a couple times as a dumbshit kid like 18 or 19 years ago, luckily I didn't do any damage (if I did I'm sure my eye doctor would have told me whilst looking at my retina during one of my many eye exams since I wear contacts.

@@EddyA1337 A "crazy person" literally cannot buy a handgun

good for blinding your enemies

These really cheap green laser pointer usually ends up in a child hand they can make everyone blind

Yup. I use lasers of the IR variety for my day job, and we treat them as weapons, same as anything else. It's frightening how many times I've seen morons play with them like lightsabers until they were literally tackled. I tell people that aren't generally around them that if they wouldn't point a machine gun being shot at their friends, they probably shouldn't point the laser that will melt their eyes at them, either.

But they are so fun to point at planes flying overhead. I'm joking but I have actually seen lasers hitting the belly of an airline plane coming in for a landing before a fireworks show near an airport.

dude its ok to use just don't point at your or anyone eye.

Just buy an IR filter and attach it to the front of the laser. Problem solved.

alex, dont listen to these guys ^ . you had the right idea throwing them away.

The only added danger is that the laser glasses designed to block these lasers wouldn't block the infrared. So if you intended to use them without an expensive pair of safety glasses, there's literally no difference in danger.

You can throw them away to my address if you like? Lol

Sometimes you see brake discs glowing yellow with your bare eyes.

Sebas Eu that's why you use IR diodes when using those cameras. For humans it's dark but for camera it's brighter than day

isn't heat IR?

EXcentriX it’s complicated. It can be.

@@Sypaka IR is a way of transmitting heat. Heat has conduction. Convection and radiation, IR would be the heat radiating from the source.

Which one

So, which channel tell the people to do garbage

Yknow telling people the name of that channel could prevent alot of harm

Can we get the cannels name?

The channel in question name is Fnoigy user/spiderplant

I'm not planning to, but we never know what the future might bring :) Besides infrared lasers, the infrared part is only a problem in DPSS-lasers as mentioned. Typically 473, 532, 589 and 593.5 nm laser pointers. The DPSS-lasers other than 532 nm are however much harder to make and are most likely equipped with an IR-filter, since they cannot be build for cheap anyway. But I would test them for IR-leakage too if I was rich enough to own one... Thanks for watching!

Yeah, that's the problem. How are people supposed to know that a cheap green laser pointer with the 'right' eye-safe rated sticker on it can be a serious eye-hazard? This is my attempt at informing as many people as possible about it. I don't own enough safety glasses to make that review/endorsement. But if they are from a reputable brand, feels overly expensive and has the OD printed on the glasses it's probably a good set of glasses ;) Thanks for watching!

I also did not know about the leakage of IR. A good video on safety would be a very good idea. Who know about the quality coming from some of the Ebay sellers. Thank You for this video and keep the cool and important things comming. Thank You

@brainiac75 I would guess a good welding helmet would be able to do the same? since they are made to 100% block IR and UV light... and if a speed glass helmet is used it will also dampen the brightness factor... but generally they should block all UV and IR light with or without a battery in them...

@4rgondo I have no experience with welding helmets so I can't vouch for them. I know there are different types. Some are not suitable for watching a solar eclipse, while others are. But if you know exactly what wavelengths your welding helmet is blocking 100% it may be an alternative for laser safety glasses. Definitely better than sunglasses, which are absolutely useless ;)

My hood is solar safe but do to it also being an auto hood laser use would not be as safe. You would have to get a glass filter that is not the auto type and then find out if it's is 100% UV blocking. What you posted in the video would explain why pilots get a bad eye injury from being flashed by some fool on the ground.

Oh wow, how did it go?

OK, I suppose. The first time they did quite a lot (~ 600 pulses, they said), and my eye looked horrible for weeks - all red. The second time was much shorter, patching up some areas they missed the first time round. That was two weeks ago: it's going to take some time for the "floaters" to clear. PS edit: as for why it happened, it's a known risk in people like me who are very myopic (short-sighted) - so I need to watch my other eye for problems too.

+Brian T Good to hear that! It's better to fix the problem before it's late.

lol "floaters" never go away dude. There is a surgery for that but its somewhat risky. Ive had floaters for at least 15 years, and they are never getting better.

+Andrew I’ve had some floaters for years too, but because of what happened they’re much worse than normal. I have been told that most will go away. I don’t want a vitrectomy if that’s what you mean: everything I’ve heard about that sucks horribly for weeks, and then you’re pretty much guaranteed to get a cataract in a few years. Nope.

Just destroy the damn thing and don't even think about using it as a laser pointer for presentations. The power label is most likely wrong.

Use a hammer

Finder's keepers, don't lose your peepers! 😁😁😁

Dork

+Anthony Z get a life dork.

If you were hit by a stick pointer it would be worse.

Ayeeee here's one Heckler!! Fkn Dork #2

hen your balls drop come back and join us adults online.. k pumpkin? bubuy now

Does the laser beam hurt your eyes through the computer screen?

@@lifeseries7944 no

@@lifeseries7944 the laser can't go through a screen, same as how radiation can't go through a screen, the laser just looks like a green beam

The Schwag true

Damn right.

Yep.

Jim Griffiths shifts in modes are the essence of dpss on warmup even on higher end lab units. That's odd you burnt yourself with "1064" the deeper IRS tend to go deep unlike the opposite end of the spectrum in the high visible 532 or even lower 450, and 405nm.

Ya but can someone translate this to english what is an IR filter

Yes, it is quite nice. Fluorescence is not limited to the usual UV-->VIS conversion. I don't know enough about it (yet) to make a video, but I'm interested in it and may look further into it. All I know right now is, that the phosphor on the green card is an 'yttrium-ytterbium-erbium compound'. Thanks for watching!

Really? You mean all three of the elements that came out of the Ytterby mine? What a coincidence!

Eric Lloyd All three? I'm pretty sure (but not absolutely certain) that the first half dozen or so lanthanides came from that mine

Sam Musson I misspoke - I meant the three that were *named* for the Ytterby mine. I stand corrected.

Big words

craig mk3 Don’t be so highly technical!

Same in (kinda) all Scandinavian countries, but there's not a huge crackdown on the lasers, cinse I can get them easily through customs

Australia is a shitshow so this isn't much of a surprise.

It's very distracting i have copped 2 at the same time while driving. From a long distance the laser dot is the size of a dinner plate on the car. I'm not surprised they are banned from being imported.

@@jaqq333 Portugal is a shithole compared to Australia. So many Porkandcheese people coming back here after moving back there because of the sinking economy. I can insult Portugal because I am of Portuguese heritage. Foda se

I'm glad I get this reference.

-Safety Googles- Regular sun glasses**

Ah, you know me Abteen. I always minimize the risks to make it somewhat safe. Though, not handling this stuff would be safest :) Greetings back from Denmark.

Brainiac75 And those laser glasses are really expensive!

Greetings to both of you from a Zoarastrian from India 🙏🏽

*@Charged Supercap* Yep, I thought twice before purchasing them... But when handling infrared lasers I have no choice but to buy proper safety glasses. Thanks for watching!

How?

@Tt Miller Unless we get tech to heal eyes! And we're getting much closer

Gadget Review Videos - wait, how does an IR filter increase the intensity of a LED flashlight? I was totally with you up to that part.