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Old 06-10-2015, 12:58 AM #1
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Default The proper effective cheap safety glasses

(completely reedited for your safety)

Hey there, I noticed that it's kinda hard for a beginner to understand which safety glasses go with which wavelengths, and even how much light can get through to consider them safe. I want to make a list for the right ones to get if you're just starting out with lasers and don't want your first build to cost you $XX+$50(glasses). I in no way encourage the purchase of cheap safety glasses like this because there is no guarantee they will work; but if you are a stubborn noob and ignore all the warnings we give you on the LPF and refuse to buy the $50 genuine safety glasses, here are some tips for you. The following information only approximates the right kind of cheap-o safety glasses. Before testing your cheap-o safety glasses with class 4 lasers, please test them with lower power lasers of the same wavelength, and do it in a safe controlled environment away from shiny objects. Also, cheap safety glasses will not cover your vision completely; you may see a gap of light between your nose and the nose in the glasses: one slip-up with a class 3B/4 laser through that gap and you could be blinded. Safety glasses from reputable laser safety companies (like Eagle Pair or Laservision) are sold based on optical density and range of wavelengths protected against. Get the genuine safety glasses, please.

If you don't want to mess around with searching for the safest ebay safety glasses sellers, I buy these safety glasses from many different sellers and approve them and resell them if they are safe to use: You can usually find them in my ebay listings, or if you want to save 10%, just send me a PM.

405nm violet lasers: amber safety glasses
Most beginning laser hobbyists might jump on red safety glasses for their go-to. But the thing is that while most pairs of red glasses on ebay will protect your retinas from 2w blue laser light reflecting all over your face, they pass an unhealthy amount of light from even low power 405nm lasers. While clear polycarbonate safety glasses may block UVB and most UVA, the yellow ones advertised to block 99% of UV will likely protect your eyes completely from even >1 watt class 4 405nm's. It's broken now, but yesterday I had a 450mw 405 running and through the glasses all I could see were fluorescing dust particles on my LPM's thermopile. Be careful though, because some brands are extremely cheap and do nothing at all. If you can see any bit of violet through your amber glasses, find another pair or opt for the $50 ones.






445nm-532nm blue&green lasers: red-orange safety glasses
This one is almost obvious because almost everyone advertises them correctly. But some do pass a small amount of light, maybe 1-3%; from 1000mw, that's 10-30mw. Not safe to reflect into your eye off of a match head. If the ones you have pass any amount of blue or green light, then throw them out and order a different pair from another dealer; or opt for the $50 safety glasses
***There is no substitute for genuine safety glasses for 532nm lasers which have no IR filter. If you use the cheap ones, you are constantly exposing your eyes to powerful infrared light***





638nm red-orange lasers: DEEEEEP blue safety glasses
Here's a major problem. If you look for glasses on ebay for use with red lasers, you get light blue glasses everywhere you look. And these light blue glasses barely work at all; just a huge safety hazard. I was fortunate to find that HDE on ebay sells them with enough pigment to protect your eyes from a 700mw 638nm laser. You will be able to see the dot through the glasses, but my LPM (thermopile) tests show that from a 480mw 638nm, about 0mw was passed. I want to stress that if you don't have a laser power meter, then there is no way to know if your pair of these glasses is effective since you can still see the dot. If you have any doubts, opt for the $50 pair of safety glasses.


650-660nm red lasers: dark green safety glasses
The simplest laser you can build is a red DVD burner. But if you're looking for safety glasses for them, all you'll find are blue glasses with green glasses few and far between. This might sway 660 users to just get the blue ones, but in reality you're much safer with green glasses. In most cases, dark blue safety glasses are completely useless for 660nm lasers. The same issue may occur as with 638nm lasers if the glasses are too lightly colored, so always try to find the DARKEST green safety glasses you can find. Even still, they may not be effective since nobody on ebay cares about red lasers anymore enough to want to make quality safety glasses for them. Since you may still be able to see the dot through the glasses, if you have any doubts, try ordering from another vendor, or just stop messing around and opt for the $50 safety glasses!

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The proper effective cheap safety glasses-img-20150609-01137.jpg   The proper effective cheap safety glasses-img-20150609-01138.jpg   The proper effective cheap safety glasses-img-20150609-01139.jpg   The proper effective cheap safety glasses-img-20150609-01132.jpg  



Last edited by AgentMcBaine; 06-11-2015 at 02:06 AM. Reason: Ok, don't delete. Gotta save some eyeballs
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Old 06-10-2015, 04:04 AM #2
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Default Re: The most reliable cheap safety glasses

Nice list just that I don't agree with you regarding ebay's safety goggles. Ebay goggles can't be trusted

Last edited by marcuspeh; 06-10-2015 at 04:05 AM.
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Old 06-10-2015, 04:13 AM #3
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Default Re: The most reliable cheap safety glasses

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Originally Posted by marcuspeh View Post
Nice list just that I don't agree with you regarding ebay's safety goggles. Ebay goggles can't be trusted
I just put this list together based on the glasses I buy again and again and have never disappointed me. How reliable these safety glasses are may change over time, and I'll update the list if I find a defective product
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Old 06-10-2015, 04:14 AM #4
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Default

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I just put this list together based on the glasses I buy again and again and have never disappointed me. How reliable these safety glasses are may change over time, and I'll update the list if I find a defective product
Those goggles are mass produce in which the quality, as well as how well it protects the eyes from lasers, will not be assured
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Old 06-10-2015, 09:24 AM #5
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Default Re: The most reliable cheap safety glasses for each wavelength

Uh green glases offer zero protection against red lasers, i have those glasses and for my red laser i see no differnce as they are not meant for that wavelength anyway..
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Old 06-10-2015, 11:50 AM #6
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Default Re: The most reliable cheap safety glasses for each wavelength

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Uh green glases offer zero protection against red lasers, i have those glasses and for my red laser i see no differnce as they are not meant for that wavelength anyway..
then i guess my thread is pointless then. Oh well, then there is really no way to help beginners be more safe. I'll mark the thread for deletion
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Old 06-10-2015, 07:31 PM #7
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Default Re: Please delete

no why would u do that ?
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Old 06-10-2015, 07:44 PM #8
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Default Re: Please delete

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no why would u do that ?
idk i made a few other pointless threads before, and now I feel like this one is unethical, advising people to buy safety glasses on ebay; that can't turn out well
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Old 06-10-2015, 09:13 PM #9
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Default Re: Please delete

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idk i made a few other pointless threads before, and now I feel like this one is unethical, advising people to buy safety glasses on ebay; that can't turn out well
It is not pointless- is a good idea to have a laser goggles/glasses information and technical thread but it has to very clearly explain everything and the associated risks which needs to be added to this thread.
Inexpensive laser glasses are not as effective as they should be for 100% protection. The post is advising people to take a risk with their eyesight/eyes . What does it matter who much or how little someone spends on a laser oir goggles/glasses---eyes are eyes.

Because preventing eye damage and safey are not matters of money it is important to encourage people to buy and use good quality protective eyewear --- at a minimum as good as these: Safety

There is a "sticky" thread about this here Get Some Safety Goggles Now!

And a good warning about eye damage thread here Irreversible Vision Damage - Don't Turn a Blind Eye to Laser Hazards

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Old 06-10-2015, 09:23 PM #10
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Default Re: The most reliable cheap safety glasses

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Originally Posted by marcuspeh View Post
Nice list just that I don't agree with you regarding ebay's safety goggles. Ebay goggles can't be trusted
Says who? If they block light, then they work, no?
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Old 06-10-2015, 09:29 PM #11
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Default Re: Please delete

No, keep this thread up! I think this is a good idea, any thread on safety that contains good valuable information should in no way be deleted!

Just make sure the information you have written is accurate and this thread may even become a sticky. Safety glasses are a huge part of the accessories needed when you own a high powered laser, and having a thread detailing the different types of safety glasses is hugely beneficial to the safety of the people on this forum

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Old 06-10-2015, 09:33 PM #12
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Default Re: The most reliable cheap safety glasses

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Originally Posted by crazyspaz View Post
Says who? If they block light, then they work, no?
They can't be trusted because of manufacturing variance. From personal experience I've had goggles that were completely useless, despite being nearly identical visually.

This thread is a good rule of thumb reference. People who are not going to shell out $50 for decent goggles may see this thread, and something is better than nothing. The info about the dark blue glasses being useless for 650nm is also valuable for new members, I've never had a cheap pair of goggles with that tint work.

@OP if you want me to delete this thread I'll do it, but I think you should reconsider

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Old 06-10-2015, 09:46 PM #13
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Default Re: Please delete

Ok, I'll keep the thread up, but should I delete the links to each ebay item? Idk, I do buy these and resell them as quality approved on ebay. Should I post a link? If the other sellers change, then newbies won't know but I would
But being honest, a noob on a budget for a first laser isn't going to shell out $50 if he can get a working pair for $12. He buys the cheap ones no matter what
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Old 06-10-2015, 09:50 PM #14
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Default Re: The proper effective cheap safety glasses

Yes keep the thread up. You've personally tested these so you should keep that information available. Don't let anyone discourage you from sharing what you've discovered from personal experience.
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Old 06-10-2015, 09:53 PM #15
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Default Re: The most reliable cheap safety glasses

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Originally Posted by marcuspeh View Post
Nice list just that I don't agree with you regarding ebay's safety goggles. Ebay goggles can't be trusted
I agree 100% there is noooooooo reason to chance a 2$ pair of glasses, one could argue it's to save money!!! So let me get this straight, you would risk the only eyes you have because you wanted to save money??????? The only glasses/goggles that should be worn are the good ones. And yes they are pricey but that is because they are safeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeee eeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeee eeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeee eeeeeeeeeeeee... lol sorry!! anywho, in my opinion "a person" shouldn't be in the hobby or even thinking about buying a laser without a good pair of safety glasses. lol nice thread though.
EDIT: I forgot to say that these types of glasses would probably be okay for the lower MW range.. Like for a first laser.... I just no from growing up with a tech crazed brother who eventually became a theoretical physicist always preached that lasers can blind faster than the human eye can blink.
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Last edited by APEX1; 06-10-2015 at 10:02 PM.
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Old 06-10-2015, 10:00 PM #16
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Default Re: Please delete

Quote:
Originally Posted by AgentMcBaine View Post
idk i made a few other pointless threads before, and now I feel like this one is unethical, advising people to buy safety glasses on ebay; that can't turn out well
When you put it that way I think you are correct.

Do a new more complete thread or maybe edit it to strongly highlight and warn of the uncertainty of the protection level inexpensive glasses/goggles are ---especially without testing them first before use.
The problem is of course how many people who don't want to pay for good laser glasses/goggles are going to go to the trouble of testing cheap ones?

Make the thread into warning about inexpenisve ebay laser goggle/glasses.

This 2012 sticky is pretty good --lists dozens of threads see: Get Some Safety Goggles Now! Not sure there is a need for another like it-0--maybe just add to it??

I would move this thread to the Safety and Legal section perhaps---just a thought--anyone looking there will find also a lot more information on safety than in the General section.

Last edited by Encap; 06-10-2015 at 10:06 PM.
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