Another vendor; similar prices; better frequency response plotting/publishing of characteristics.

----> https://www.thorlabs.com/newgrouppage9.cfm?objectgroup_id=762

I have chosen the cheap goggles too, but for a couple of watts on purple and other visible. Not your 3KW infrared case. Have them tested before wearing.

Another way: ----> https://lasersafetyindustries.com/products/laser-face-shield-190-375-nm-820-1080-nm

But smells that 'Industries" link above is not an industry; just another vendor.

Something I did not know before playing with laser goggles is that wearing a protection that fully blocks all that wavelength, you cannot tell if the laser emission is present-ON. Some light has to pass to be recognizable and you to be aware. There has to be other similar untold explanation characteristics, do not take my word for the subject. No clue on how a IR block goggle can show presence of the emission. Explore that !

(Like holding a concrete block in front of you. Does stop the IR; but you do not know sheet of what is happening.) I would try IR CCTV to monitor the action from another safe room.

 

Have them tested before wearing

Any suggestions as to how to do that?

 

More measuring equipment $... Has to be similar to ---->

But measuring the passing IR beam you do not see, not just visual as the video. Cannot suggest something. Talk to Edmund Scientific; perhaps they have a service to confirm whatever goggles you buy are safe for such-such your case. And do not believe any youtube.

 

I've just bought a 3000W fiber laser machine for cutting metallic materials and I'm currently looking for protective eyewear. The laser source is a YAG, China Max brand, wavelength is 1080±3 nm.

There seem to be lots and LOTS of options out there. From the very and suspiciously cheap, to the so-expensive-it's-luxurious.

Amazon offers an extremely wide variety of glasses. But looking at the comments, I can see that some of them are no better than sunglasses.

Any recommendations as to where to find good, certified eyewear at reasonable prices? I need to buy at least four pairs.

Definitely talk to the vendor. You need to determine optical density (OD) needed at the wavelength of the laser and at the power output of the laser. It's something you could measure if you had the right equipment, but the vendor should already have done this.

You could have a 1200 nm laser at a few mW and get away with 1 or 2 OD at that wavelength. Drive that up into the 10's of watts range or higher and the OD needs to be much higher. One particular laser that I worked with in the past required 4 OD at its operating wavelength. That was a fairly low power lab laser. A 3kW cutting laser is going to need much more than 4 OD at its operating wavelength.

Proper laser safety glasses will have an OD spec at a particular wavelength e.g. X OD @ Y nm.

You only have one set of eyes. Take care of them and don't take shortcuts. Call the vendor.

 

Any suggestions as to how to do that?

Reputable safety glass manufacturers will test their lenses and provide specs.

These guys aren't cheap, but I wouldn't go cheap when it comes to my eyes.

https://lasersafety.com/eyewear/