Possiblity of Pilot Eye Damage

[Laserman532]

Damn hard to guess looks like he is doing EVERYTHING wrong.

sounds like abuut 100pps, it is flashlamp pumped, not at focus, spurious specular reflections everywhere, no stable mount- crap he is doing everything wrong...but he got green

sorry i meant 100ppm

[mixedgas]

Damn hard to guess looks like he is doing EVERYTHING wrong.

sounds like abuut 100pps, it is flashlamp pumped, not at focus, spurious specular reflections everywhere, no stable mount- crap he is doing everything wrong...but he got green

and we're not even discussing the safety whoopisises yet!

Steve

[The_Doctor]

4 things? I'll try these:
Lack of planning of beam path, and of reflected beam paths. (What Pat said, too, about reflections).
Lack of dark fire-proof or ablation-proof beam stop for main beam.
Lack of guard for main beam, because anything that can spark green from a crystal outside the cavity is STRONG, so maybe the whole beam path should be physically inaccessible to objects except where planned for.
Unpredictable interruption and deflection of beam due to insecure mounting of parts. (Pat mentioned that too).

Possibly others like lack of door interlocks, this guy isn't taking much care. Might live alone and have perimeter locked and windows screened for all I know though.

I bought a YAG a while back. Small Q-switched rangerfinder type. I still haven't built it into a working system, because of the work and planning needed to do it right. At times I feel a bit lame about that because it's not that hard to do, but right now I feel ok about it. Some things should never be done recklessly, no matter what the urge, or how easy other can make it look. Besides, I bought a set of goggles with OD 6.77 for 1060 nm on the strength of that, and they might be the more important thing. (Still not entirely sure about that 1060 as opposed to 1064 either, but they seem to strongly attenuate broad IR sources so I guess they're ok. They also don't hinder most of the visible spectrum either, they make it slightly green tinted and a bit darker but not by much).

On pilots and planes, I think the margins are too hard to predict. Steve mentioned some of the factors. Numbers about light don't cover this, there are way too many physiological and psychological unknows in the mix. Knowing numbers to calculate can just as easily give a false sense of security. The best they can do is help present a case for planned and careful use of a laser. In the UK, the best thing the govt can do is release the guidelines for laser shows for free, as a download. If they start trying to mint money out of it as more people run shows, they'll be seriously challenged by whoever is in political opposition the moment some inquiry finds that a serious accident migh have been prevented if that advice had been freely available. The real priority is to get people aware of how to plan safe laser use, and forcing them to pay is as crazy as forcing people to pay for a vaccine against a dangerous infectious disease. There should be no practical excuse not to get it, and certainly no deliberate obstruction to prevention just for small short term gain.

[mixedgas]

hint, start with the tool

Steve

[The_Doctor]

Can't. Not much most people could do to identify it. All I can see is a small cable or bunch of wires and a terminal block, and what looks like a gripper from some small assembly robot being waved around, or more likely just a pair of pliers. It's shiny, so obviously hazardous.

Anyway, Pat and me suggested some safety problems, but you've twice suggested we're looking in the wrong place. What can be so serious that the points we've raised become so insignificant? And how come it seems to elude two of us, neither idiots, and Pat being at least a decade or two more experienced than me? If it's really that important you need to spell it out because otherwise people really aren't likely to understand it.

[Laserman532]

Can't. Not much most people could do to identify it. All I can see is a small cable or bunch of wires and a terminal block, and what looks like a gripper from some small assembly robot being waved around, or more likely just a pair of pliers. It's shiny, so obviously hazardous.

Anyway, Pat and me suggested some safety problems, but you've twice suggested we're looking in the wrong place. What can be so serious that the points we've raised become so insignificant? And how come it seems to elude two of us, neither idiots, and Pat being at least a decade or two more experienced than me? If it's really that important you need to spell it out because otherwise people really aren't likely to understand it.

well i see he is using pliers, but i would use channel locks I still stick with he is doing everything wrong. pLus it appears that the laser is also not stable pulse to pulse gain appears to being wiped out or something thermal is happening. And that is one big ass cube, probably KDP not KTP not in focus area, external cavity doubling yields basically NADA. go back to the drawing boards...but he made green

[The_Doctor]

Ah, but I can make green when I pick my nose. Of course, this is the kind of experience for which witnesses would need goggles with an OD that goes way high.

And, I kind of think Steve was looking for something extremely specific. Not sure it could be to do with the laser pulse varying though, I decided to ignore that because I could see as much variation in the camera responses, so I just let it go. Kind of amazing he didn't slay that camera..

[Laserman532]

Ah, but I can make green when I pick my nose. Of course, this is the kind of experience for which witnesses would need goggles with an OD that goes way high.

And, I kind of think Steve was looking for something extremely specific. Not sure it could be to do with the laser pulse varying though, I decided to ignore that because I could see as much variation in the camera responses, so I just let it go. Kind of amazing he didn't slay that camera..

lets go back to slandering the dousche bag with the vag burner- good ol normellow he is an easy target. I hope thats not the norm i knew way back when.

Hey doctor, when you get your yag runnin it is easy to extra cavity double- you probably know this anyway but others may not. put a 2" fl lens at output, ktp at focus on rotary stage and a 2" fl lens on the other side of ktp- rotate ktp bingo green. (you get a bit of ir as well, but that just makes it more interesting to keep from blinding yourself) we use to extra cavity double yags for fun. low power but real easy to do.

[Soulstorm]

Calcs done on the old wickedlaser/lasercommunity forums for my old 532 100mW pointer put it able to cause flash blindness at up to 300-400m away.

As a commercial pilot trainee.. a 20-50mW or more pointer flashed my way on final approach at night would be very distracting. I'm sure Pitts could tell you even more!

Problem with these sorts of lasers [high powered pointers] is they are the ones that will cause regulations to come down upon laser show/projector users, when in the wrong hands. I know people who'd cause chaos if they got hold of a green dpss, because your average pleb won't think of consequences.

[Laser Ben]

I wouldn't trust anything on that forum, it was such complete bull. Any forum ran by a company with financial interest in what people say cannot be trusted in my opinion.