Safety Glasses for 350-400mW 405nm Laser?

[Fortyfive]

So I just got my 8x build from dark. Its an 8x BR with a 405g1, and should be outputting between 350 - 400 mW of power. I currently have the red wicked laser shades, which work for green and violet wavelengths. However I want to be on the safe side, and Im wondering if these are sufficient for this class of power, and what safety glasses might be recommended for use with my new baby. If your in the 8x club what goggles are you using?

Any info would be greatly appreciated,

Thanks,

-Greg

 

[Laser_Ben]

Shine the laser into the glasses and measure the power out the other side. If it is less then 2-3mW, then you are perfectly safe.

 

[Fortyfive]

Thanks for the quick response Ben, the only problem is I don't have an LPM to test with yet, and I only have one pair of glasses.. Id be worried about catching a reflection while shining it off of the goggles.

Im not sure if you own a BR around this power but I did see the multi watt 532nm your boss gave ya. If you don't mind me asking which do you use while operating that? BTW I almost bought one of those LPM's you were selling for a friend but I didn't have the cash at the time.

Thanks again for the help..

-Greg

 

[themandalorian]

IT should be fine? Ask WL if it's safe, just say you have one of their 400mw blues.

I just got a pair of glasses from OEM laser systems

 

[Laser_Ben]

Thanks for the quick response Ben, the only problem is I don't have an LPM to test with yet, and I only have one pair of glasses.. Id be worried about catching a reflection while shining it off of the goggles.

Im not sure if you own a BR around this power but I did see the multi watt 532nm your boss gave ya. If you don't mind me asking which do you use while operating that? BTW I almost bought one of those LPM's you were selling for a friend but I didn't have the cash at the time.

Thanks again for the help..

-Greg

When I operate anything below 1W, I use glasses with a minimum of OD 2.5 for the wavelength. Anything above 2W I use glasses with a minimum of OD 4. While these are not the safest glasses out there for the power, they protect against a difuse reflection, and slow the amount from a direct hit to something the eye can react to with normal blink reflex.

If I am dealing with 808nm for anything other then alignment, I will use OD 12 glasses, for alignment, I use OD 3 glasses which allows the viewing of where the beam is going. I usually don't mess around with UV lasers as I do not want to go through the same precautions with covering skin.

As for the power meters, I still have one unit left, send me a PM and we can work out a nice deal

 

[dr-ebert]

Shine the laser into the glasses and measure the power out the other side. If it is less then 2-3mW, then you are perfectly safe.

Well... yes and no. See this thread, particularly starting at post #13. The problem with OD alone is that it doesn't tell you how long the glasses can withstand a direct hit before burning through. Some more info on that here.

 

[lasersbee]

I agree with dr-ebert...

I just now did a small test with our Newport power meter and the
Focal Price "Anti-Green" goggles... using the SPYDER I Pro laser
from WL...

Using the goggles as eye protection the beam was very weak but
could be seen to target the Newport Thermopile...

Without warming it up it was outputting 302mW..

I put another pair of FP goggles in the beam and the power shot down
to about 1mW and less... (the lens was in the beam for about 15 seconds)

After shutting the Laser OFF... I notice the Laser's beam had melted the
FP Goggle's plastic red lens.... but not through...
Still usable... but annoying... a quick direct hit of 300mW of green would
probably not cause and damage to the lens..

So If you are going to test Plastic Lensed Laser Safety Goggles with higher
powered Lasers... be prepared... they may get damaged...


Jerry

 

[Fortyfive]

I had that same experience as well when I tried that laserbee. My opto 150 actually left a mark where it shined through. It does reflect most of the light tho, which is why I was worried about doing that test again without a second pair of goggles. This is the highest power laser I've owned to date, and I just wanted to be sure. I have front surface mirrors, and various optics Id like to use without worrying.

Thanks for all the help guys, I appreciate it!

-Greg

 

[themandalorian]

Hmmm is a 5mw laser supposed to shine through the ones from OEM laser systems, because the dots shines through mine. I also bought a pair from focalpoint so I'll compare the two