CNI green laser safety glasses demonstration

A demo of how 532nm safety glasses protect your eyes against 532nm laser that is properly IR filtered. Of course, the glasses pass all IR, so if your green laser is not IR filtered, these will not protect you. This is in support of my Rayfoss fail video.

Category:

Science & Technology

Tags:

• CNI
• laser
• safety
• glasses
• green
• 532nm

[theultimateforce100]

where do you get the mw reading thing??

[laserchase]

@theultimateforce100

That one is made by a guy in Canada. The unit is called a Laserbee I. Search on google for Laserbee LPM (Laser Power Meter) and you'll find the guy. There are numerous different manufacturers and models out there, so do some reasearch before buying. There could be something better and / or cheaper by now.

[laserchase]

@Xaiborg

You should not see the beam with safety glasses, only the dot. But, to somewhat answer your question, laser safety glasses have an OD rating for each wavelength they cover. The lower the OD number the more light in that wavelength the glasses will pass. The higher the number, the less light will pass. So if you have a 50mW green laser, you probably don't want an OD7+ set of glasses. ;) (wouldn't even see the dot) oemlasersystems is a nice source to consider.

[lardtaziumwadmaster]

@laserchase laser, you seem to be very knowledgeable about lasers. With an unfiltered Ir, but glasses, if I catch a reflection off say, a mirror or a tv screen or a window from a 50mw, will there be any damage? assuming it just passed through my eye real quick. It wasn't there for a few seconds before I realized and went damn...

[laserchase]

Very unlikely to have any perm. damage from 15 or 20mw that was reflected off of something in a short flash. I'm not an eye doctor, but I have heard of people taking direct hits for a fraction of a second from moderate power and recovering just fine after a few days of spots. The danger of IR is just that we can't see it and thus don't naturally blink or look away to avoid it. If anything is wrong with your vision, you should probably see your eye doc - but my guess is your fine.

[Xaiborg]

Is it true that red lasers don't produce an IR beam? I was looking into goggles and things awhile ago and I thought red lasers didnt need IR filters, but I'm not sure

Also, how do you get goggles that are safe enough to view the laser, while actually being able to see the beam.

Thanks

[laserchase]

@Xaiborg

Visible red lasers like 655nm do not make any IR, since you are using a red diode. In the case of green, the laser has an IR diode inside and other components convert the IR to 532nm. Some IR will always come out along with the 532 though, the process is not perfect. Attaching an IR filter will block the stray IR on green lasers.

Now if you have an 808nm laser, that will be making IR light but have a slightly visible red dot.. in that case, it is all IR. 655 = no IR

[survivorevil]

@laserchase actually you could see the dot. You could see it because of the luminescence of the materials. The laser would be completely blocked but still you could see the dot

[theultimateforce100]

sorry to pester but which laser are you useing there?

[theultimateforce100]

@laserchase Thank you,most guys i ask just send a reply saying f off normaly