So I see the rioters are using Lasers to blind people . I know that protective glasses are easily available but they have different ratings . Does anybody here have any idea what wavelength these Lasers might be ? I've done a little reading and it can be a bit confusing .

Most of them are:

650nm or 'Red'

532nm or 'Green'

405nm or 'Blue"

Most recreational lasers are at 5mW or lower. Industrial lasers are closer to the 20mW range and can reach out to ~62 miles. The big fancy lasers can be aimed at the retroreflectors on the moon and register as a returned frequency by sensitive equipment.

Of these, I would consider the 405nm laser to be the most interesting visible laser.

Green= 532nm wavelength. This is probably the most common color to be seen at a riot. It's most visible to the human eye at day and night. It's also a difficult color to produce in a small package.

Laser safety glasses need to be rated for the wavelength and optical density. I use Honeywell, LaserVision, Sperian and Glendale. I work with 343nm, 355nm, 532nm, 1064nm 9um and 10.6um lasers.

I'd suggest something with at least an optical density above 3 for the specified wavelength. Something like this would be better suited for a tactical situation.

https://www.lasersafety.com/product/f39-p5e01-5000/

Unfortunately, laser glasses for the 532nm wavelength are usually very dark and impair your vision. I have some clear laser glasses that work on the extreme ends of the spectrum 190nm-355nm and 9um to 10.6um, but are useless in the visible light spectrum. Once you go from 355um (ultraviolet), the glasses turn darker as you increase wavelength to around 1064um (infrared; invisible to the human eye).

The higher the optical density for the specified wavelength, the more it slows light down and allows your body to use the aversion response to look away. My co-worker took a direct hit in the eye with an 18 watt 532nm picosecond laser and his goggles bubbled up. They worked just long enough for him to pull a Matrix move and get out of the way. Had he not been wearing his glasses, his eyeball would have turned into a boiled egg.

These are the ones I personally use at work with an OD protection of 8+ at 532nm
https://www.lasersafety.com/product/f22-p5l16-5000/

Tony.

This message has been edited. Last edited by: benny6, August 07, 2020 08:42 AM

I believe there is now a market for laser-proof riot shields. Someone should make some ASAP.

Kentek has polymer laser windows. Looks like they are about $400 for a 12" x 24" sheet. These could be attached behind clear riot shields. Optical density of 6+ at 532nm.

https://www.kenteklaserstore.c...ic-laser-window.aspx

Tony.

We have the Republican National Convention coming up in a couple of weeks.

This laser mess is a concern of mine.

I agree, benny6: Kentek should be all over that!

(I have a bit of Kentek material in some machines at work. Neat stuff, for sure.)

CCD camera and panel would be good for a "riot" shield. Allowing clear and even enhanced vision in lower light conditions and provide full protection, since no light passes directly though, only a display of what the camera sees.

Having "quick change in field" capability of the CMOS/CCD unit would allow any camera damaged enough by a laser to be rapidly replaced.

quote:

Originally posted by sigmonkey:
CCD camera and panel would be good for a "riot" shield. Allowing clear and even enhanced vision in lower light conditions and provide full protection, since no light passes directly though, only a display of what the camera sees.

Having "quick change in field" capability of the CMOS/CCD unit would allow any camera damaged enough by a laser to be rapidly replaced.

Sort of a modern approach to fighting Medusa. I like it.

I’m worried about when they discover IR lasers. I hope officers here have some monitoring method for that.

Unless you’re using an IR viewer, you won’t know where it’s shining. Trying to hit an eyeball at 50 yards away with an invisible beam would be luck. The sheets I posted a link to has a optical density of 5+ at 1064nm (infrared).

Watching those videos of the rioters shining lasers at that woman outside her home was scary .

Do these glasses end all possibility of injury or do they just reduce the damage?

quote:

Originally posted by gw3971:
Do these glasses end all possibility of injury or do they just reduce the damage?

It depends on the size and power of the beam. They are there to protect you from scattered radiation and temporary protection from direct hits of a laser beam.

A high power pointer can probably be reduced to grocery scanner levels.

Anyone emplying a laser as a weapon should be shot on the spot.

flashguy

^^^

agreed

no second thought, make it a reflex...have people on the perimeter actually looking for the lasers and take care of them quickly and quietly

this can be solved in two, perhaps three nights

Well somebody better figure something out because these assholes are using lasers more and more . And not just against Police .

The blue wavelength lasers are pushing 5 watts.

More than enough to do permanent eye damage.

They are likely using higher powered lasers than the 5 mW consumer limit in the US. You can buy these on the street in many countries.

quote:

Originally posted by flashguy:
Anyone emplying a laser as a weapon should be shot on the spot.

flashguy

Blinding is grievous bodily harm.

Shine a LASER at me at your own risk.

There is protection from focused laser radiation.

Would come in handy if the antifags make it into the burbs.

We use the Eagle like the kid in the videos for our Co2 gantry laser.

https://www.survivallaserusa.c...1667093_1527285.aspx