Thank you. Always embarrassing to make public mistakes, but it is how we all learn from it as you mention. Look for the 808 nm leakage. That's the telltale sign. More mistakes to come :P
@@brainiac75 Hi Brainiac, you never made a public mistake, it's very difficult to tell the difference between 2nd order (internal diffraction) of a primary beam, or a 1st order of a primary beam.
@@brainiac75 I don't know if I am missing something but you have not actually checked to see if the 1064 is indeed second order diffraction; you would need to do so by using a filter before the input to your spectrometer. If the peak goes away once you do, then there actually is 1064. Curious to know if you did do that.
I've been a hobby laser fan since my first helium neon laser in the early 90's salvaged from a supermarket barcode scanner. Paid a fortune for a green laser a few years later. Now do laser shows using RGB laser systems that can easily put out 8w into a white beam using all 3 colours. My last eye test, the optician asked if my job involved lasers, as I have a small spot in my right retina that has damage. I can only see it on bright sunny days if I turn my head quickly, I can see a small black speck for a slight moment. SO even if you're very careful, you can still get a flash from a reflection and not notice at the time.
Even weak lasers could cause damage. Even though class 1 lasers are safe, if taken out of its original component, it could be dangerous. Any classes above that could still cause eye damage through unmomentary exposures (class 2-3r) and momentary exposures (3b and 4) 3bs may be safe at low levels, but you should always wear goggles for class 3b and 4 lasers.
Perfect! You included examples of lasers in daily life, explained well the safety classes, and cleared up that 1064nm thing all in one wonderfully edited and narrated video!
Laser rating does change some with the beam power density. For example, a fat beam laser using a beam expander, spreads what used to be a 1mm Beam into about a 5mm beam. The beam makes a great visual effect in fog or haze, but is both much more skin and eye safe as the power density is much lower and the larger beam illumines much more of the fog or haze in the air. This is often used in theatrical laser beam effects for concerts. The laser pumping the beam may be a class 4 laser expanded to a 10mm beam, greatly reducing the damage it can cause on skin or to the eyes as most of the energe does not enter the pupil, so the power that enters the pupil is greatly reduced by the spread beam. They are much safer than the same power in a very small diameter beam. For example a normal small beam 50mW laser would be a class 4 laser, but expanded to a fat beam, the power density is reduced for a device rating of Class IIIb. Google green Fat Beam Laser Module for examples. Some garden lasers are rated for the total laser power, for the laser contained, however when split many times with a diffraction grating, the individual beams very often fall into class I or class II laser products. Keep this in mind when ordering garden lasers.
Do you know after diffraction grating how much power is lost for each dot? I ask because kids are playing with 100mw green lasers with diffraction grating lenses and pointing them other kids. I wonder how big is the danger when the beam is not that focused.
@@sabotage3d That would be something to ask the manufacture. The center beam is the brightest and the highest hazard. Some pointers are very small and thus high power density. The safer ones have a beam diameter greater than 3mm, and is typically 5mm. If it makes tiny spots, watch out.
Your series on lasers is very very cool. I'm still a student in university with a big curiosity for lasers (and magnets!). Big fan of your TH-cam channel! Quality over quantity videos...
I think there might be something about the laser being split up using diffraction gratings and if the laser is split up, you do something to say that the dots themselves are class 3R even if the diodes are pretty much class 4.
Yeah, that's what I also think. There are so many dots that a single one would so weak that it could be just a class 1 laser by it self. It's like a class 2+ laser being just class 1 because it is shielded inside a DVD-Player...
Question: what kind of magnet would you recommend for magnet fishing? I'm sure you have heard of it but if not it's where you tie a magnet on the end of a rope and throw it into a river or lake. Then slowly bring it back to shore. You are hoping the magnet attaches to something valuable that someone dropped or threw in the water. You also retrieve a lot of junk so it's cleaning the body of water you are at which is a plus. So it needs to be strong enough to dislodge something heavy from mud but small enough to throw.
I remember the sticker from the bottom of a PlayStation 1, it says "CLASS 1 LASER PRODUCT" - I always thought this is some self marketing meaning that it's a good quality laser :D
Fist of all, well done videos im enjoying to watch. Second thing I was hesitating to point out, is the fact, that you simply can't compare the output power of a laser to any class. This you all might agree with, and we saw in the video, the optical output power differs from cheap lasers. Then you always have to calculate the minimal spot diameter of the laser by a direct hit into the iris. This is why the information "typical power" is garbage. Take cautions when handling frequency doubled lasers, as they can emit quite a strong amount of optical radiation no blinking reflex covers your eyes. ...but, keep it fun and more important keep on !
I'm not an expert on it, but I believe it uses a peltier element/thermocouple to generate an electric current. The laser heats the element on one side and the heatsink around the power head cools the element on the other side. This temperature difference generates an electric current. The more power the laser emits, the more the element is heated and the stronger the electric current. The shown model will handle up to 20 watts if all of the sensor area is used. 20 watt focused down to a small spot would probably damage the sensor's coating... Thanks for watching!
@@brainiac75 I'm guessing it would have to be a coated copper plate with some thickness on the front mounted to the peltier device. Or maybe even a little vapor chamber to distribute the heat even better. Peltier elements cant tolerate terribly high temperatures and their surface is normally a ceramic plate, which isn't great for distributing heat from a single point.
"if you're unsure of their true classification" If you don't know what frequencies a laser emits, laser glasses are no guarantee of safety. Or if the hazard is secondary emission and not the laser itself. No laser glasses can protect you from the broadband blue/white thermal emissions of a 100000 degree fireball.
They know that if they actually spec it out to within legal limits people will complain that it's too weak and crappy, so they just say it's "legal" on the box so stores will sell it.
I'm sure you've considered this, and I would definitely suspect consumer-grade garden ornaments to be less accurate than scientific measuring instruments, but have you checked the calibration of your laser measurement device?
Fun fact:You can see TV remote controls flash of Infrared radiation using your devices camera try it out (because your devices camera can see a bit more than the visible spectrum) Also because TV remote controls use Infrared radiation so that's how TV's know what button your pressing. Try it and you'll believe me. If I have a wrong grammar don't blame me English is not our primary language but secondary.
What if you measure one dot after the diffraction grating? Unless you shove your eye into the laser, it is unlikely to get hit from more than one dot at a time.
I looked directly at a class 3b/4 when I was a kid it was the big ones with a key from a small corner shop now I have to wear glasses as my eye sight is terrible
A few months ago I picked up a $15 laser show like this for indoors (with fan) and if the specifications are to be believed, it uses a pulsed 50mw green and 200mw red. It's definitely pulsed and definitely bright, with no infrared filter. I'm not 100% sure the green is a DPSS beam, however, since the package size is so small (smaller than the thinnest pen-style green pointers. I'm just so much out of the loop with laser tech, I didn't think you could get a green 50mw direct diode for under $20 ?
Question about lazerbeamz. I recently found an optical drive in the scrap from a Lenovo laptop, it was marked with both class 3B and class 1. I assume therefore it is a 3B class laser? Quite bamboozled.
always love watching your videos, and thanks for correcting yourself........learning is never a one-shot thing, we always make mistakes and learn from them as time goes on......keep on making amazing videos, want to see more magnet videos actually, i had a science question myself i was curious about..........do you think that aluminum that has been broken down by gallium, can be reformed into a solid state? been all over youtube, and cannot find an answer to that
Laser power meters: I don't know if you can just scale test distance and aperture to get a good reading. It's gotta hit like 50% of the sensor area within some max and min. spot profile energy density. Try a de-focus? I don't know.
9:18... In basically clean air (no high levels of suspended particles) if the total Laser's Beam falsl on the active part of the LPM's Sensor... The distance from the sensor in a typical room will not make a difference. Just like increasing the size (diameter) of the beam will not change the LPM reading as long as ALL of the Laser's bean falls on the Active Sensor area.
True, but in this case there is a double-axis diffraction grating in front of the lasers so distance matter. Even at only 30 mm distance quite a lot of the smaller beams diffracted from the main beam don't hit the sensor. I think that's how they get away with such a low classification. I guess, the classification system was not meant for lasers like this. Or they just put on the sticker they like to ;) Thanks for watching!
Hey do i need laser glasses while working with dvd drive laser ? I have some spare drive and want to play with those laser too, but i get skeptical abut me eyes. So i never opened them.
Could it be that they measured the garden laser by only measuring one of the dots? After all unless you are directly in front of it you're never going to see the full energy, right?
I have a feeling I know why. you know how the DVD/BluRay Laser is class 1 due to being enclosed? I assume the defraction grating makes it so these lasers are classified lower, as the beam cannot hit you completely unless you void the warranty by taking it apart.
@@brainiac75 There really should be a class for "will set your hair on fire", one for "Will shoot a hole right through you" and of course "vaporizes your entire house"
Can you try to make some laser yourself? Your videos are educating, you actually explain something and they are good quality too but i always miss that DIY in your videos... great channel!! But this will make it better☺ you learned me lots of stuff Brian, thanks!!☺
i wonder what class the laser in my CD recorder would be if taken out of the product (and I've also discovered one of the optical drives in my desktop doesn't have a sensor to tell it when the draw is fully closed, so if the draw is prevented from closing all the way, it will sometimes think the draw is fully closed)
If it can record on an optical media, it is likely quite strong. Class 3B typically. I wouldn't worry to much about laser light escaping from a not fully closed drawer. The lasers inside an optical drive are focused down to a tiny spot on the optical discs. Meaning it is not focused anywhere outside the drive :) Thanks for watching!
Aren't the lasers used in the product classified in themselves from their manufacturers? Then the final product is classified in it's intended use, which is WITH filters and diffusers?
although i'm not 100% sure, i'm going to assume visible spectrometers behave the same as mass spectrometers. if that is the case, resolution and accuracy are not directly correlated. you can have very poor resolution with pretty good accuracy, and vice versa
Next, try lying down into your neodymium magnet at your back and put other neodymium magnet in front of your body.. can the neodymium magnet potentially loosing belly?
I have no idea what the consequences would be here in Europe. Bad cases would probably be prohibited from further sale. But they are not very likely to be discovered before someone gets hurt... Thanks for watching!
Another thing that is even more of a hazard now are the newer cheaper green laser pointers on eBay. They don't have a current regulating driver so when you slap in a lithium ion they hit 100mw easily. It's sad but also kind of impressive that they are so cheap and yet able to take the abuse. The more I see these cheap overspec laser products the more I fear more and more restrictions will be mandated. Glad you and others inform people because it cuts down on possible misuse and injury.
If 1MW laser was available did it will come with own power plant? Or it will be connected to Tesla Megacharger (this is charger for Tesla Semi, it deliver ~1 MW power)
@@brainiac75 The smallest reactors SMRs (Small Modular Reactor) have 50MW (I mean reactors that produce electricity in power plants, this not the smallest one, there is smaller reactors used in marine), typical reactors have 300 - 1500MW, almost every nuclear power plant have more than one reactor, bigest operational nuclear power plants have ~6 reactors, ~1000MW each, my country doesn't have any nuclear power plant, my country is backward, we have bigest in europe coal power plant, that use 100 000 tonnes of lignite everyday, 1 tonne every second :(
Could be. My logic just was that the 7 mm aperture is probably to mimic the eye's pupil. A beam divergent enough to fill out a 7 mm pupil at 14 mm distance, would fill out a 15 mm pupil at roughly 30 mm distance. I probably just should make my own 7 mm aperture and place it at 14 mm distance and have the laser power meter's sensor behind it :) Thanks for the input and watching!
@@brainiac75 Interested to see how that goes if you end up making one, anyway, thanks for the literal years of amazing videos. Stay safe and keep 'em coming!
Once again a very interesting and informativ video! I never thaugt that those things can be thus dangerous Do you remember me from the plasma ball video? Cause by mine the glass broke and I am speculating about how dangerous it would be to turn on!
Thanks, Lukas! Buyer's beware when it comes to Chinese build lasers (and aren't they all?). I don't remember exactly what you commented. I go through so many comments, that they all blur out at some point in the future :) It is relatively safe to turn on. The center piece will still have a high voltage but at very low amperage. You won't see any sparks from it in normal air. It could burn your finger from the electric arc if you touch it though...
@@brainiac75 no need to worry! I know you have more important stuff to remember! Thanks for answering So it's a should be safe but be smart and don't do it situation
It's quite a good power supply, that you could have some fun with if careful. Try placing one end of a fluorescent tube on the center and turn the plasma ball on. Should light up fine. Just don't touch any metal on the fluorescent tube - it can burn you. What you don't want to do is directly touch the electronics under the plasma ball.
@@lukasvondaheim You should know the basic high voltage safety rules if you want to use it. It will put out more current than you'll ever get through the glass normally and if you pass current through your body it does slowly damage and kill some of your cells. Dont do it for hours. So in short, it wont kill you, but it's also not healthy, so avoid coming in contact with it.
Well done telling us what we should watch out for when using laser products and also making an educational video that's also entertaining. 😃 I'm curious, does your PS4 sound like a jet engine too? 😅
Glad you like it, zUltra. I love making these laser videos. Definitely not the last dubious laser I will test :D And no, my PS4 is fine despite its age. But then again, I barely have time to play games, so it has mostly been used for playing blu-ray movies... Thanks for watching!
wikipedia Class 3R (formerly IIIa) lasers are usually up to 5 mW and involve a small risk of eye damage within the time of the blink reflex. Staring into such a beam for several seconds is likely to cause damage to a spot on the retina en.wikipedia.org/wiki/Laser click on safety or you can do a search for 3r. a megawatt laser would probably require a very high amount of power way beyond the 5 volt power supply and tiny electronics and heatsink for cooling. a megawatt laser may be more like the lasers used in hollywood especially the movie short circuit
Hehe, it does have 2 radiant lasers = 2R laser ;) It is interesting how they can use stronger lasers with two apertures without going up in laser class compared to the single aperture models. If the two lasers were combined to one laser beam as in the one-aperture models, it would be way more risky. Thanks for watching!
Ja, den kraftige "class 2" laser er købt i Jem&Fix for mange år siden. Jeg har ikke set den til salg de seneste år. Nok også bedst med tanke på, hvor usikker den er at bruge. Den 'nye' class 3R købte jeg i Silvan i januar sidste år. Har af gode grunde ikke set nogen i butikkerne i år, når de er tvangslukket. Men generelt har de ikke rigtigt været på hylderne de seneste år. LED er ved at overtage. Men de kan købes overalt på nettet. Har set en på nettet med blå og røde lasere. Var bare lidt for dyr efter min smag ;)
@@brainiac75 - Tak, har kigget efter dem uden held (eller, måske er det heldigt taget i betragtning når det kommer til stykket - de er ikke gratis, ikke brugbare til det helt store, og ikke legetøj :-) eBay har nogle kraftige 5-15W engraving lasere til p.t ca. £100, men jeg tror en CNC fræser i miniformat er bedre egnet til mine formål. Måske en idé til en opgradering af dit arsenal?
Garden lasers are supposed to be strong because the diffraction grating splits that power into multiple lower power dots. Let's just say that the total power of the green laser was 10 mW, the whole laser projection would be kind of boring.
Honestly, they should be classed as weapons outside of approved use cases. Teaching, development, etc outside of approved use cases should be licensed with 'person in charge' licensee responsible.
I don't think the 2R was a typo Because it showed up in two places Unless the Typo was just carried over But I doubt it Also It was interesting to learn that 332nm is Actually 331.65
Yeah, maybe they started with typing 3R on the packaging and changed the number after seeing the laser manufacturer had a sticker with class 2 on the laser. The labeling is not controlled by anyone but the manufacturer itself. Never trust it ;) Thanks for watching!
Styropyro had demonstrated a multi megawatt pulse laser. It has duration of a few nanoseconds and used for tattoo removal. The strongest laser cutter may have a few Kilowatt sustained output.
These things make me nervous. A family friend has one of these in their front garden pointed at the house, sometimes the beams shine through the window. They bought it at a cheap shop, no idea of it's safety or quality.
A single beam from far away is not likely to cause damage, but I would still be careful with it. Lasers are never meant to be looked into - unless they truly are class 1 ;) Thanks for watching!
The laser class system needs a serious overhaul. Every subclass and whatever needs it’s own number. Sure it’s fine for people who work with lasers, but for the random person who buys a laser pointer and sees that one is a 2 and one is a 4, they don’t know the massive jump only 2 numbers could be.
I wonder where these lasers get made, I suspect that all the components are made by different companies, and the one doing the final assembly either doesn't know how to classify the lasers, or has been given an incorrect classification from the company providing the laser component. Maybe they ask that company what classification it should be, describing the end product to them and so they guess based on similar products and nobody ends up taking any measurements. Of course that's all speculation, but these kinds of things happen when hi-tech equipment gets manufactured cheaply.
Love that you corrected what you said in previous videos with your new information. We all learn
Thank you. Always embarrassing to make public mistakes, but it is how we all learn from it as you mention. Look for the 808 nm leakage. That's the telltale sign. More mistakes to come :P
@@brainiac75 Hi Brainiac, you never made a public mistake, it's very difficult to tell the difference between 2nd order (internal diffraction) of a primary beam, or a 1st order of a primary beam.
Only a true intellectual is comfortable correcting oneself
@@brainiac75 I don't know if I am missing something but you have not actually checked to see if the 1064 is indeed second order diffraction; you would need to do so by using a filter before the input to your spectrometer. If the peak goes away once you do, then there actually is 1064. Curious to know if you did do that.
I've been a hobby laser fan since my first helium neon laser in the early 90's salvaged from a supermarket barcode scanner. Paid a fortune for a green laser a few years later. Now do laser shows using RGB laser systems that can easily put out 8w into a white beam using all 3 colours. My last eye test, the optician asked if my job involved lasers, as I have a small spot in my right retina that has damage. I can only see it on bright sunny days if I turn my head quickly, I can see a small black speck for a slight moment. SO even if you're very careful, you can still get a flash from a reflection and not notice at the time.
9:55
Wait till you find 150 Mm calipers on ebay!
styropyro agrees
@@kswiorek That’s 150,000,000 meters. I think.
@@chri-k um .....no
Remember, always wear safety glasses!
Even in supposedly weak lasers, it's better to be safe than sorry!
_especially_ if they’re green
Even weak lasers could cause damage. Even though class 1 lasers are safe, if taken out of its original component, it could be dangerous. Any classes above that could still cause eye damage through unmomentary exposures (class 2-3r) and momentary exposures (3b and 4) 3bs may be safe at low levels, but you should always wear goggles for class 3b and 4 lasers.
Perfect! You included examples of lasers in daily life, explained well the safety classes, and cleared up that 1064nm thing all in one wonderfully edited and narrated video!
1:34 - The smile says "Yes, Mine is bigger"
Good video as usual. I like that you are not afraid to admit that you made a mistake. Keep up the good work. I’m from Denmark too.
Laser rating does change some with the beam power density. For example, a fat beam laser using a beam expander, spreads what used to be a 1mm Beam into about a 5mm beam. The beam makes a great visual effect in fog or haze, but is both much more skin and eye safe as the power density is much lower and the larger beam illumines much more of the fog or haze in the air. This is often used in theatrical laser beam effects for concerts. The laser pumping the beam may be a class 4 laser expanded to a 10mm beam, greatly reducing the damage it can cause on skin or to the eyes as most of the energe does not enter the pupil, so the power that enters the pupil is greatly reduced by the spread beam.
They are much safer than the same power in a very small diameter beam. For example a normal small beam 50mW laser would be a class 4 laser, but expanded to a fat beam, the power density is reduced for a device rating of Class IIIb. Google green Fat Beam Laser Module for examples.
Some garden lasers are rated for the total laser power, for the laser contained, however when split many times with a diffraction grating, the individual beams very often fall into class I or class II laser products. Keep this in mind when ordering garden lasers.
Do you know after diffraction grating how much power is lost for each dot? I ask because kids are playing with 100mw green lasers with diffraction grating lenses and pointing them other kids. I wonder how big is the danger when the beam is not that focused.
@@sabotage3d That would be something to ask the manufacture. The center beam is the brightest and the highest hazard. Some pointers are very small and thus high power density. The safer ones have a beam diameter greater than 3mm, and is typically 5mm. If it makes tiny spots, watch out.
Very informational. You give clear examples and details about each laser classes. Keep it up.
Finally! A good TH-cam video from the God of Lasers Himself
God of Magnets*, but yes
Mh... He is very good indeed. Very professional also but the real God of Laser is styropyro.
The god of lasers is styropyro. He is not far behnd tho.
@@Squeaky_Ben you're right.
*What if they team up*
@@spacedaway World domination.
Your “Hi” always is sooooo welcoming
Your series on lasers is very very cool. I'm still a student in university with a big curiosity for lasers (and magnets!). Big fan of your TH-cam channel! Quality over quantity videos...
If you had a 1 MW laser, you might get employed by the LEGO Co. to make new molds.
I’ve benn looking for this for a while, keep it up Brainiac75 !
I think there might be something about the laser being split up using diffraction gratings and if the laser is split up, you do something to say that the dots themselves are class 3R even if the diodes are pretty much class 4.
Yeah, that's what I also think. There are so many dots that a single one would so weak that it could be just a class 1 laser by it self. It's like a class 2+ laser being just class 1 because it is shielded inside a DVD-Player...
Hi! Glad to see a new video, you are amazing.
Thanks, Lucia. Much more videos to come!
I remember shining these in my eyes because I liked the colours
Thanks for this amazing experiments I really enjoyed it 😀
You're welcome, Sofia. Much more experiments to come :)
Question: what kind of magnet would you recommend for magnet fishing? I'm sure you have heard of it but if not it's where you tie a magnet on the end of a rope and throw it into a river or lake. Then slowly bring it back to shore. You are hoping the magnet attaches to something valuable that someone dropped or threw in the water. You also retrieve a lot of junk so it's cleaning the body of water you are at which is a plus. So it needs to be strong enough to dislodge something heavy from mud but small enough to throw.
Neodymium magnet.
I remember the sticker from the bottom of a PlayStation 1, it says "CLASS 1 LASER PRODUCT" - I always thought this is some self marketing meaning that it's a good quality laser :D
Haha, it could be read as 'first class' x) Thanks for watching!
@@brainiac75 I'm not just watching, I'm a supporter on Patreon ;)
Ah yes, all the way back to 2019 if you have the same 'avatar' on Patreon. Thank you so much.
Fist of all, well done videos im enjoying to watch. Second thing I was hesitating to point out, is the fact, that you simply can't compare the output power of a laser to any class. This you all might agree with, and we saw in the video, the optical output power differs from cheap lasers. Then you always have to calculate the minimal spot diameter of the laser by a direct hit into the iris. This is why the information "typical power" is garbage. Take cautions when handling frequency doubled lasers, as they can emit quite a strong amount of optical radiation no blinking reflex covers your eyes.
...but, keep it fun and more important keep on !
How is the laser meter constructed so that it isn't damaged when used? I'm curious on the method it uses to measure the light.
I'm not an expert on it, but I believe it uses a peltier element/thermocouple to generate an electric current. The laser heats the element on one side and the heatsink around the power head cools the element on the other side. This temperature difference generates an electric current. The more power the laser emits, the more the element is heated and the stronger the electric current. The shown model will handle up to 20 watts if all of the sensor area is used. 20 watt focused down to a small spot would probably damage the sensor's coating... Thanks for watching!
@@brainiac75 I'm guessing it would have to be a coated copper plate with some thickness on the front mounted to the peltier device. Or maybe even a little vapor chamber to distribute the heat even better. Peltier elements cant tolerate terribly high temperatures and their surface is normally a ceramic plate, which isn't great for distributing heat from a single point.
"if you're unsure of their true classification"
If you don't know what frequencies a laser emits, laser glasses are no guarantee of safety. Or if the hazard is secondary emission and not the laser itself. No laser glasses can protect you from the broadband blue/white thermal emissions of a 100000 degree fireball.
They know that if they actually spec it out to within legal limits people will complain that it's too weak and crappy, so they just say it's "legal" on the box so stores will sell it.
I'm sure you've considered this, and I would definitely suspect consumer-grade garden ornaments to be less accurate than scientific measuring instruments, but have you checked the calibration of your laser measurement device?
Fun fact:You can see TV remote controls flash of Infrared radiation using your devices camera try it out (because your devices camera can see a bit more than the visible spectrum)
Also because TV remote controls use Infrared radiation so that's how TV's know what button your pressing. Try it and you'll believe me.
If I have a wrong grammar don't blame me English is not our primary language but secondary.
What if you measure one dot after the diffraction grating? Unless you shove your eye into the laser, it is unlikely to get hit from more than one dot at a time.
Hej Brian. I'm enjoying your videos. Your voice is very hyggeligt 😊
I looked directly at a class 3b/4 when I was a kid it was the big ones with a key from a small corner shop now I have to wear glasses as my eye sight is terrible
Lasers Lasers everywhere👌👌
My day had started and you made it
Huh?!?
HUH?!?!?
I used to work on laser micrometers and frequently you'd need to look at the reflection of a scan line, sometimes a stopped beam, all
thanks, now i know which lasers to stare into :)
A few months ago I picked up a $15 laser show like this for indoors (with fan) and if the specifications are to be believed, it uses a pulsed 50mw green and 200mw red.
It's definitely pulsed and definitely bright, with no infrared filter. I'm not 100% sure the green is a DPSS beam, however, since the package size is so small (smaller than the thinnest pen-style green pointers. I'm just so much out of the loop with laser tech, I didn't think you could get a green 50mw direct diode for under $20 ?
Class 4 is where the fun begins
I agree. Though a high-end class 3B laser like the 450 mW green Hercules is entertaining too ;) Thanks for watching!
Question about lazerbeamz. I recently found an optical drive in the scrap from a Lenovo laptop, it was marked with both class 3B and class 1. I assume therefore it is a 3B class laser? Quite bamboozled.
always love watching your videos, and thanks for correcting yourself........learning is never a one-shot thing, we always make mistakes and learn from them as time goes on......keep on making amazing videos, want to see more magnet videos
actually, i had a science question myself i was curious about..........do you think that aluminum that has been broken down by gallium, can be reformed into a solid state? been all over youtube, and cannot find an answer to that
Laser power meters: I don't know if you can just scale test distance and aperture to get a good reading. It's gotta hit like 50% of the sensor area within some max and min. spot profile energy density. Try a de-focus? I don't know.
what kind of class are laser scanners for bar codes and can they damage your eyes?
9:18... In basically clean air (no high levels of suspended particles) if the total Laser's Beam falsl on the active part of the LPM's Sensor... The distance from the sensor in a typical room will not make a difference. Just like increasing the size (diameter) of the beam will not change the LPM reading as long as ALL of the Laser's bean falls on the Active Sensor area.
True, but in this case there is a double-axis diffraction grating in front of the lasers so distance matter. Even at only 30 mm distance quite a lot of the smaller beams diffracted from the main beam don't hit the sensor. I think that's how they get away with such a low classification. I guess, the classification system was not meant for lasers like this. Or they just put on the sticker they like to ;) Thanks for watching!
Hello Im from Denmark i love you vids
Hi Viben. Greetings from Jylland. Much more videos to come!
@@brainiac75 good we like you videos just found you When i was looking for ferrofluid And i Saw you and Im from Sjælland and sorry for my english
My first heart
Hey do i need laser glasses while working with dvd drive laser ?
I have some spare drive and want to play with those laser too, but i get skeptical abut me eyes. So i never opened them.
DVD *read* lasers aren't typically very strong (though, no guarantees), most examples I've found online say
Thank you for the info.Very helpful.
Are they measuring an individual beam out of the diffraction grating? As if it's a collection of lower powered lasers all clustered together?
Could it be that they measured the garden laser by only measuring one of the dots? After all unless you are directly in front of it you're never going to see the full energy, right?
I have a feeling I know why.
you know how the DVD/BluRay Laser is class 1 due to being enclosed?
I assume the defraction grating makes it so these lasers are classified lower, as the beam cannot hit you completely unless you void the warranty by taking it apart.
They are probably just measuring just 1 of the "stars". The manufacture I bet considers each star a beam.
With the current laser classification rules the death star technically counts as a class 4 laser.
Yes, it's a class 4. Wear safety glasses xD Thanks for watching!
@@brainiac75 There really should be a class for "will set your hair on fire", one for "Will shoot a hole right through you" and of course "vaporizes your entire house"
Are they testing the laser with the thing fully assembled? I imagine you would get a lower rating if it was farther away and split
Man. . .
Guess what, i have the same Printer at Home, after 5 Years, it still works like new.
every day when I see these things I'm like: one day your eyes will have trouble seeing and you'll have to look no further than this thing.
Braniac75! I have a challenge for you!
Can you get ferrofluid to spike on more than 2 poles, perhaps useing a pyrimid magnet or other shape?
I wonder if, like how more powerful lasers in a system can be class 1, if the diffraction gratings, etc turn a 3R laser into a class 2
Can you try to make some laser yourself? Your videos are educating, you actually explain something and they are good quality too but i always miss that DIY in your videos... great channel!! But this will make it better☺ you learned me lots of stuff Brian, thanks!!☺
I guess you'll have to watch styropyro for that
@@Basement-Science i am watching him, what do you think😀 but it would be nice if there will be more people like this
@@zlunazelena4080 Yeah I figured. Not many people doing that. Also not the absolute cheapest hobby if you want to go beyond a DVD laser pointer.
i wonder what class the laser in my CD recorder would be if taken out of the product
(and I've also discovered one of the optical drives in my desktop doesn't have a sensor to tell it when the draw is fully closed, so if the draw is prevented from closing all the way, it will sometimes think the draw is fully closed)
If it can record on an optical media, it is likely quite strong. Class 3B typically. I wouldn't worry to much about laser light escaping from a not fully closed drawer. The lasers inside an optical drive are focused down to a tiny spot on the optical discs. Meaning it is not focused anywhere outside the drive :) Thanks for watching!
Aren't the lasers used in the product classified in themselves from their manufacturers?
Then the final product is classified in it's intended use, which is WITH filters and diffusers?
Should a class 2 laser pop balloons or melt black plastic or is my laser mislabeled.
Do you provide free laser safety glasses to the wildlife in your garden?
although i'm not 100% sure, i'm going to assume visible spectrometers behave the same as mass spectrometers. if that is the case, resolution and accuracy are not directly correlated. you can have very poor resolution with pretty good accuracy, and vice versa
A stellaser megastructure for powering light sail spaceships would be class 4, apparently
Next, try lying down into your neodymium magnet at your back and put other neodymium magnet in front of your body.. can the neodymium magnet potentially loosing belly?
1:47 the barcode is your serial number...
Hopefully he sees this just in case someone tries anything weird with the support site
Even if it was a typo I’m pretty sure the company would get a write up. It would fail the regulations set by the NRC at least, in the US
I have no idea what the consequences would be here in Europe. Bad cases would probably be prohibited from further sale. But they are not very likely to be discovered before someone gets hurt... Thanks for watching!
The way the power cable is plugged into the wall next to your printer is a little sketchy :D
Another thing that is even more of a hazard now are the newer cheaper green laser pointers on eBay. They don't have a current regulating driver so when you slap in a lithium ion they hit 100mw easily. It's sad but also kind of impressive that they are so cheap and yet able to take the abuse. The more I see these cheap overspec laser products the more I fear more and more restrictions will be mandated. Glad you and others inform people because it cuts down on possible misuse and injury.
Also it is not a mistake, you are indeed getting 1064 from the ND:YVO4 which has made it past the KTP output coupler.
If 1MW laser was available did it will come with own power plant? Or it will be connected to Tesla Megacharger (this is charger for Tesla Semi, it deliver ~1 MW power)
A 1 MW continuous beam laser would require its own nuclear power plant or a Death Star to run it x) Thanks for watching!
@@brainiac75 The smallest reactors SMRs (Small Modular Reactor) have 50MW (I mean reactors that produce electricity in power plants, this not the smallest one, there is smaller reactors used in marine), typical reactors have 300 - 1500MW, almost every nuclear power plant have more than one reactor, bigest operational nuclear power plants have ~6 reactors, ~1000MW each, my country doesn't have any nuclear power plant, my country is backward, we have bigest in europe coal power plant, that use 100 000 tonnes of lignite everyday, 1 tonne every second :(
Maybe you need to quadruple the distance between the laser and your aperture? Because your aperture has 4x the area of the aperture they test against.
Could be. My logic just was that the 7 mm aperture is probably to mimic the eye's pupil. A beam divergent enough to fill out a 7 mm pupil at 14 mm distance, would fill out a 15 mm pupil at roughly 30 mm distance. I probably just should make my own 7 mm aperture and place it at 14 mm distance and have the laser power meter's sensor behind it :) Thanks for the input and watching!
@@brainiac75 Interested to see how that goes if you end up making one, anyway, thanks for the literal years of amazing videos. Stay safe and keep 'em coming!
What if when monster magnet meets Hydraulic Press?
Oooh, new video.
Once again a very interesting and informativ video! I never thaugt that those things can be thus dangerous
Do you remember me from the plasma ball video? Cause by mine the glass broke and I am speculating about how dangerous it would be to turn on!
Thanks, Lukas! Buyer's beware when it comes to Chinese build lasers (and aren't they all?). I don't remember exactly what you commented. I go through so many comments, that they all blur out at some point in the future :) It is relatively safe to turn on. The center piece will still have a high voltage but at very low amperage. You won't see any sparks from it in normal air. It could burn your finger from the electric arc if you touch it though...
@@brainiac75 no need to worry! I know you have more important stuff to remember! Thanks for answering
So it's a should be safe but be smart and don't do it situation
It's quite a good power supply, that you could have some fun with if careful. Try placing one end of a fluorescent tube on the center and turn the plasma ball on. Should light up fine. Just don't touch any metal on the fluorescent tube - it can burn you. What you don't want to do is directly touch the electronics under the plasma ball.
Those things aren t very powerful i guess it will be like 10-15 watts, however i will still not recommend to touch it xD
@@lukasvondaheim You should know the basic high voltage safety rules if you want to use it. It will put out more current than you'll ever get through the glass normally and if you pass current through your body it does slowly damage and kill some of your cells. Dont do it for hours. So in short, it wont kill you, but it's also not healthy, so avoid coming in contact with it.
Well done telling us what we should watch out for when using laser products and also making an educational video that's also entertaining. 😃
I'm curious, does your PS4 sound like a jet engine too? 😅
Glad you like it, zUltra. I love making these laser videos. Definitely not the last dubious laser I will test :D And no, my PS4 is fine despite its age. But then again, I barely have time to play games, so it has mostly been used for playing blu-ray movies... Thanks for watching!
I enjoyed can you make more videos about radioactive ☢️!
wikipedia
Class 3R (formerly IIIa) lasers are usually up to 5 mW and involve a small risk of eye damage within the time of the blink reflex. Staring into such a beam for several seconds is likely to cause damage to a spot on the retina
en.wikipedia.org/wiki/Laser click on safety or you can do a search for 3r.
a megawatt laser would probably require a very high amount of power way beyond the 5 volt power supply and tiny electronics and heatsink for cooling.
a megawatt laser may be more like the lasers used in hollywood especially the movie short circuit
"STYRE: 2R" stands for STYREEE, TUUU REEEZUURZZ, or chingrish for 'style: two lasers' ;D
Danish*
Hehe, it does have 2 radiant lasers = 2R laser ;) It is interesting how they can use stronger lasers with two apertures without going up in laser class compared to the single aperture models. If the two lasers were combined to one laser beam as in the one-aperture models, it would be way more risky. Thanks for watching!
Sounds 4:30 like a good cat scarier
I like your videos they are sciencetific
For at undgå add'ikk'ere - er den købt i Jem&Fix?
Ja, den kraftige "class 2" laser er købt i Jem&Fix for mange år siden. Jeg har ikke set den til salg de seneste år. Nok også bedst med tanke på, hvor usikker den er at bruge. Den 'nye' class 3R købte jeg i Silvan i januar sidste år. Har af gode grunde ikke set nogen i butikkerne i år, når de er tvangslukket. Men generelt har de ikke rigtigt været på hylderne de seneste år. LED er ved at overtage. Men de kan købes overalt på nettet. Har set en på nettet med blå og røde lasere. Var bare lidt for dyr efter min smag ;)
@@brainiac75 - Tak, har kigget efter dem uden held (eller, måske er det heldigt taget i betragtning når det kommer til stykket - de er ikke gratis, ikke brugbare til det helt store, og ikke legetøj :-)
eBay har nogle kraftige 5-15W engraving lasere til p.t ca. £100, men jeg tror en CNC fræser i miniformat er bedre egnet til mine formål. Måske en idé til en opgradering af dit arsenal?
"Starry Night"
*more like super bright*
im pretty sure another revision is needed if Styropryo exists
congrats in your 666k subs!
i guess the laser could maybe pass as 3R when it is tested at the further distance with the defraction grating.
Garden lasers are supposed to be strong because the diffraction grating splits that power into multiple lower power dots. Let's just say that the total power of the green laser was 10 mW, the whole laser projection would be kind of boring.
Honestly, they should be classed as weapons outside of approved use cases. Teaching, development, etc outside of approved use cases should be licensed with 'person in charge' licensee responsible.
I don't think the 2R was a typo Because it showed up in two places Unless the Typo was just carried over But I doubt it Also It was interesting to learn that 332nm is Actually 331.65
Yeah, maybe they started with typing 3R on the packaging and changed the number after seeing the laser manufacturer had a sticker with class 2 on the laser. The labeling is not controlled by anyone but the manufacturer itself. Never trust it ;) Thanks for watching!
@@brainiac75 That is Definitely possible. Thanks for responding 😂
When do we get to see a megawatt laser
Styropyro had demonstrated a multi megawatt pulse laser. It has duration of a few nanoseconds and used for tattoo removal. The strongest laser cutter may have a few Kilowatt sustained output.
Marco reps
These things make me nervous. A family friend has one of these in their front garden pointed at the house, sometimes the beams shine through the window. They bought it at a cheap shop, no idea of it's safety or quality.
A single beam from far away is not likely to cause damage, but I would still be careful with it. Lasers are never meant to be looked into - unless they truly are class 1 ;) Thanks for watching!
5:12 LUVONOX MUSIC GO BRRR.
only one laser diode had heatsink around?
Holiday laser projectors, yeah way overpowered.
Well why did I have to get reminded about order 66 while I was looking at your subs
FINALLY HE IS BaCK
Only been gone for a month as usual ;) th-cam.com/users/brainiac75videos
@@brainiac75 yeah 😊😊
The laser class system needs a serious overhaul. Every subclass and whatever needs it’s own number. Sure it’s fine for people who work with lasers, but for the random person who buys a laser pointer and sees that one is a 2 and one is a 4, they don’t know the massive jump only 2 numbers could be.
It is still safe if you mounted the laser high enough that the distance between you and the apparatus is greater than 1 meter.
Found a class 3b green laser in a nightlight on Amazon.
will he see my comment? Let's see...
nice video!
Since you comment so fast after upload, you are guaranteed to be noticed. Thanks for watching!
@@brainiac75 loved the video!
@@brainiac75 hello
These are great to shine at your house so when you look outside you get blinded
I wonder where these lasers get made, I suspect that all the components are made by different companies, and the one doing the final assembly either doesn't know how to classify the lasers, or has been given an incorrect classification from the company providing the laser component. Maybe they ask that company what classification it should be, describing the end product to them and so they guess based on similar products and nobody ends up taking any measurements. Of course that's all speculation, but these kinds of things happen when hi-tech equipment gets manufactured cheaply.
Gonna bust out the MW laser decoration and turn my home into Swiss cheese
Are u an laser expert :-)
i love this chanel