MISLABELED LASER | Power and wavelength? 

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Facts

There is no point in mentioning a product like C-47s without a link to get the product since a search of the product brings up C-47 military planes. Please provide a link to the webpage so that your viewers can order the products you mention in your videos.

Seriously? Then try searching "clothes pin." LOL. Or, even "C-47 clip." Try that on Amazon or RU-vid and they come right up. ru-vid.com/video/%D0%B2%D0%B8%D0%B4%D0%B5%D0%BE-DYitF14SN0k.html

Midnight Habit correction, 'never trust a *China* laser pen manufacturer'.

I have videos with most of the symbols. I just didn't use my logo in such an active way back then. Thanks for watching!

Like the Portal chamber signs! www.google.com/search?q=portal+chamber+sign&source=lnms&tbm=isch

what is the square root of pie

Shona, there's really a lot wrong with you.

Fire was at burning ferripaste

Thats just silly. Do you really think he is irresponsible enough to record the videos without laser filters over the camera lens?

omg i hope hes joking otherways he should buy brain instead of glasses

Some don't get the joke.

@@robintaylor3713 r/wooosh Looks like someone doesn't get the joke...

@@josephstalin7995 looks like you don't get Robin Taylor's joke XD

Yep, that's scary. Just another reason to always wear safety glasses when using unbranded, cheap lasers. I really need a laser power meter...

Extremely dangerous to the public really, retina can't feel heat and also you can't perceive the IR wavelength.

LtKernelPanic actually the leak would be 808 and 1064. Given the rate divergence of the NIR coupled with the optics set for collimating of the 532, the NIR beams expand quickly and lose optical density over a few inches. The NIR is of most concern if a direct hit to the eye is made at very close range. If you walk your thermopile or optical sensor back away from the aperture you should see the power drop right off..

ffggddss I am currently taking an AP calculus and physics class and this comment triggered the PTSD I have developed towards advanced trigonometry

+ Random stuff: OOh, that sounds serious. I prescribe a few hours' dosage of pure topology, which doesn't care one whit about distances and shapes. Fred

*see comment •

Why am I not surprised :) I really need a laser power meter. Only way to know the real power. Which one do you have?

Brainiac75 It was in the lab at the hospital I worked at, I don’t remember what brand it was.

soupisgdfood Awesome 👍. As long as you use safety precautions ;)

@@brainiac75 get a pocket laser power meter from Laserpointerstore, definitely not as accurate as a laserbee or so, but Will give you really good idea of the power You're dealing with with just a ~5mw or so margin of error at 200mw by example

Mine is 5000 miliwatts

I agree. Cheap, unbranded lasers directly from the Chinese slow boat should never be trusted to be eyesafe. A laser power meter is needed to know the real strength of such a laser. Thanks for watching!

Welcome aboard - and thanks for the support! Quality content takes time - the illustrations shown a few seconds around 2:00 took some hours to make alone. I really appreciate when people can tell, I'm not doing things the easy, low-quality way :)

Yes, in it's essence it is! There's 250 double slits per mm in the video though ;)

Brainiac75 So if you use somekind light sensitive material, a film or something and close your eyes when powering the laser, you should see a wave pattern?

Haha, glad I could get you back on the right track. Much more to come :D

Junk that You guys buy,

You can buy anything in the US. We have high powered lasers for cutting wood or anything else. I have a pretty powerful 1000-1200 mW retina fryer in handheld form, there is nothing wrong with that (treat it with respect, don't focus it on anything since a T-shirt takes 3-5 seconds to light on fire, that should be obvious) My personal rules: Wear eye protection (high quality glasses or a VR headset looking through your phone screen and its camera: so the worst you do is ruin a camera) Do not shine in the sky Shine only on your own property, and preferably indoors where nobody will accidentally get a reflection (so close the room door if others are around), a reflection could blind someone, and that would be awful When burning things, do it over concrete or a ceramic dish or metal pan (its also going to smoke a lot, so keep in mind you need to open a window. You could make a quick vent hood with a window fan, cardboard, and duck tape if you do this often) Also don't burn plastic in your house, its toxic smoke. The rest is common sense (in case the above wasn't).

Oh yeah, don't use the retina fryer as a laser pointer, that should be obvious since in my personal rules I said don't use it outside or in the sky, and everyone needs to be wearing eye protection. Use a regular low power laser for that, besides, this one might catch whatever your pointing at on fire...

Jake Garrett Even a plane?

Ha, yep, the exact reason why you follow rule number 2 on the list... I guess technically also number 3 and the common sense rule, but some people seem to leave common sense at home. You should always take common sense with you!

Sorry to hear about your accident. How many milliwatt/watt was it?

Brainiac75 518nm 240mW. I don't want to say it was an amazing sight when sight faded blue then black but it was something I'll never forget. Surprisingly it didn't hurt but reading or watching videos with both eyes strains my right eye now because by itself can't see anything directly, and will give me a headache.

Brainiac75 It was a custom from an old friend of mine that just disappeared.

Thanks for sharing. Amazing laser, I just wish shit never happens, but it often does :(

Brainiac75 I still have my peripheral vision in it so things can't sneak up on me. I'm glad it was just one eye honestly. And I have nobody to blame but me. Some people don't understand the importance of safety equipment until it's too late.

It should work for a relative measurement between the (assumed) below 5 mW bluray laser and the more powerful '435 nm' laser. I just don't have a laser with a known, stable power to do an absolute reading :( A blackened peltier module and multimeter might be useful too, but thanks for your suggestion and watching :)

I see. Bunch of arses... Putting wrong specs in products. "Wonderful" widespread practice in a lot of industries, but I thought lasers were not one.

VeteranVandal But on the bright side… cheap powerful lasers.

i got the Blue/violet Laser 303 from ebay. It also says maximum output 5mw and yet i can burn a match with it, pop ballons, edge plastic, etc. These wrong labes are put on there to get it through customs because the chances are (if the laser doesnt look like it will roast your brain on instant) they will open it but not test it.

VeteranVandal Out of curiosity, what other industries are you aware of that have massive mislabeling issues? Just so anyone reading might know to look for.

high power laser can burn things ,pls have a look at wildlaser.com/product/2018-new-focusable-waterproof-best-quality-638nm-700mw-red-laser-pointer-flashlight-with-charger-battery-2-modes

Thanks Onyx. More to come - love back from Denmark :D

Customs confiscated them ;o(

Awesome - welcome aboard! Much more to come :)

I was thinking that during the video XD

mariakismarios That is cool to the nth degree!

Science! ru-vid.com/video/%D0%B2%D0%B8%D0%B4%D0%B5%D0%BE-Y2VNxmn0lNA.html

Go to youtube user styropryo's channel for loads more

_ Aliens _ !!!!😂

Thanks for watching and commenting as always :) Cheers from Denmark.

Thank you very much for the support. I do try to improve for every video, so who knows where we'll end :) Sometimes I just need to turn down a little on my own quality expectations or the video will never be done x)

Wow! I didn't expect a reply from you Brian. Quality > Quantity. That is what makes your channel so great unlike some other channels that put out videos like twice a day. That way you have more time to focus on the quality of your videos if you upload less frequently. And like I mentioned previously it's more exciting that way. But it's OK if you tend to upload more frequently because the quality of your informative and entertaining videos will never change. :)

حي الله فهد الغامدي

Quick Look n Teardown , حياك الله أخي .

I just get scrap projector lasers. Couple hundred bucks, 40 watts. That'll do 'er. I have yet to turn one on, because that's a terrifying amount of laser.

In recent years, the laser diodes between 25mw and 50mw has seen a drop in value, mostly because they aren't really good for a lot. They damage the eyes, yet they are also too weak to do anything actually useful. It is these that are making it into mislabeled products, due to being cheap.

Hehe, I was always pleased to finally see a new video from bionerd23. I may not be the most frequent uploader, but some are worse ;) Thanks for watching!

Quantum physics! At this time of year? At this time of day? In this part of the country? Localized entirely within your kitchen?

Niels Simenon perfect..

Imagine, in an alternate universe, the light behaved in the same way... Mind blowing I know!

Niels Simenon, Yes!

it's not quantum physics, it's basic physics, tesla proved it 100 years ago.

Thanks :) And welcome aboard!

Nicolai Mass lol @ people replicating smaller complex maths eaisly. Us 3 are alone. top comment is simply "lasers! ". Kittens for boys! Isnt that odd. Kittens love lazers

I like how you have hidden humor in your videos, few people catch some of it, I'm sure.

Isn't 0th order fairly accurate? I'm not a physicist, but I'm pretty sure he hit the terminology spot on.

C47 a peg inthe UK

I would like to see a power reading from a calibrated power meter before determining that the power level is above spec. The balloon and match tests are not a valid power measurement.

Jay _ 5mW won't pop a balloon or light a match. I've got a "5mW" pointer here that metered at 50mW on a calibrated LPM. I've seen others reach nearly 100mW.

Some green lasers work by starting with a powerful infrared laser, and upconverting the frequency to green by passing the infrared beam through a special crystal. This is a very inefficient process and the output beam will be contaminated with a lot of the original IR. There is supposed to be a filter to remove the IR, but if it is bad/cheap/crappy, there may still be a lot of IR in the laser's output. The original IR power might be 20 or more times the power in the green output, so even a true 5 mw green laser might have much more than 5 mw IR coming out. I've never used a calibrated LPM, but if it is sensitive across the whole spectrum, it might be seeing the power in any contaminating IR in addition to the green light. If you are wearing goggles to protect your eyes from the green wavelength, you might still be getting dangerous IR (which is invisible) to your eyes, unless the glasses happen to also filter IR well. Morale: Don't trust protective glasses alone, and avoid chance reflections/etc. anyhow.

Laurence, great point. The 532nm laser is almost certainly a frequency-doubled Nd-Yag. The main output of the Nd-Yag crystal is invisible 1064nm and only a small portion of that is converted to 532nm by a KD*P frequency doubler. The laser label only specifies the 532nm output. Similarly, many other lasers lase on more than one line or have outputs besides the one specified on the label.

Jay _ valid Typically these 405s are anywhere from 30mW to 80mW *when* they are over 5mw, and the match lit at a speed comparable to his estimate. 5mW will barely smoke black tape when tightly focused and no chance at igniting a match. I've mounted hundreds of 405s since they broke into market in ps3 sleds and phr diodes, many hours with a power meter *and* matches... This obviously doesn't provide a "valid measurement" but certainly is an accurate indicator.

Thanks for watching all the way to the end, Surya :) I'm pretty sure, I'm gonna make that video mentioned. The preliminary results are interesting... I could use your comment in the video.

Brainiac75 I read somewhere that a smartphone camera could double as a spectrometer. Just to let you know. Obviously, it can only be used for Red, Green and Blue wavelengths.

I have a 488nm directly-injected portable diode laser coming tomorrow (08-21-2018) afternoon; it was sold as 1mW on Ebay but the photographs in the listing were sufficient to tell me that it's gonna meter a whole lot more -- possibly greater than 35 or 40mW. We'll soon see how everything comes out in the wash. :-)

Haha, I do often use LEGOs in my videos. But clothespins can be so convinient :D

I wouldn't mind if he uploaded a bedtime story, audio only. Would probably shoot to my most "watched" list. :D

you are a genius

Okay, I won't.

Thanks! I'm not done with making videos about lasers :)