Its very greeeeeeeeen

[Doc]

You must remember this from a post originally on LPF (now removed) caused by an 800mW 445, apparently he didn't feel anything at the time.

The shorter wavelength burns much quicker than a red or green at the same power,

Attachment 29626

[Doc]

You must remember this from a post originally on LPF (now removed) caused by an 800mW 445, apparently he didn't feel anything at the time.

The shorter wavelength burns much quicker than a red or green at the same power,

[Doc]

^^ Dunno what happened with the triple post ? ^^

[Eidetic]

Someone hit in the eye with a 1 W blue laser.

http://www.laserpointersafety.com/ne...97e677-206.php

http://laserpointerforums.com/f53/hi...ser-69469.html

A few well documented instances of injuries caused by laser light getting where it doesn't belong doesn't change the fact that the lasers themselves are very safe devices to own and use. From the link cited above:

"Relatively low injury rate from Class 4 lasers

This is the second injury from a Class 4 (above 500 mW) 445 nm diode that we are aware of. In the first case, the person affected wrote that the spot was not noticeable and he has “ceased worrying about it.”

While injuries are always of concern, it should also be kept in mind that many thousands of these high-powered 445 nm diodes have been used in homebuilt and commercial handheld lasers. Class 4 lasers are universally considered to cause instant eye damage. Therefore, the fact that there have only been two (reported) cases out of thousands of lasers in use, is relatively good news. When affordable 1 watt laser diodes first came out in 2010, we at LaserPointerSafety.com felt that there would be many accidents. We are pleasantly surprised to have been proven wrong.

Keep in perspective that many consumer products cause widespread and/or significant harm. The pages Risks of laser pointers and U.S. CPSC laser pointer reports give an idea of the injury rates and severity for typical consumer products and for consumer lasers. In general, consumer laser injuries are less common and less severe than those of many other consumer products.

(The above information is independent of the question of restricting Class 4 laser use by the general public. That is a separate issue which probably hinges more on the rate of laser misuse against aircraft, than on the rate of eye injuries.)"

[mmuhler]

I remember back in the day when I had a Laser show company (just a hobby now) we went to visit our competition anonymously at a rave Circa 90s, they had there kids with them and they were playing tag on the stage with two spectra physics 171 powersupplies all service panels REMOVED! (for those who have never seen one of these supplies they look like a small refrigerator just the perfect height for a child to run into) not to mention the 20watt beams were pretty much at a eye level on the stage. One of the owners of the laser show company and I believe one of the kids dad reached in his pocket to give us his card and a set of works where revealed during this exchange.

Hmm.... 20watts of laser power, 480VAC primary voltage, DC laser voltage don't recall been a while but both are LETHAL! kind of like the electric chair, inter venous drugs, kids running around the stage. If that's not a recipe for disaster I don't know what is. That is the scariest scene I have ever witnessed in my life time. As far as I know the kids survived the night SCARY SCARY VERY SCARY.

[rszemeti]

Hmm.... 20watts of laser power, 480VAC primary voltage, DC laser voltage don't recall been a while but both are LETHAL! kind of like the electric chair, inter venous drugs, kids running around the stage. If that's not a recipe for disaster I don't know what is. That is the scariest scene I have ever witnessed in my life time. As far as I know the kids survived the night SCARY SCARY VERY SCARY.

I have at times done worse. I had one of the original Ferranti 300W CO2 systems, with the big scary 22KV DC psu at half an amp?. Cover off? I barely remember runing it with the covers on! 300W beams across the workshop and watch the wall glowing is always funny. Not as funny as what a 2Kw trumpf does to a breeze-block though Interlocks? a screwdriver and a tiewrap soon sorts that.

There is however one crucial difference. That was me, and possibly a well informed mate, in a fully enclosed facility. We knew what to expect and what we were doing, and the only people at risk was ourselves. I fully approve of people learning through experience and messing with stuff. Even dangerous stuff, but the limit is when you put others at risk.

Like the green laser across the garden .. the photos look scary .. but in reallity, we are miles from anywhere, theres a safe backdrop and the beam stays on my property, with no risk of anyone walking through it because the nearset neighbours are sheep and 500m away.

Blowing your eyeballs out through your own stupidity is one thing ... putting others at risk, quite another.

[steve-o]

I had to get one of the kids to hold it in position .. /
Beam is not so good in the last shot as the pesky infant would not hold the maginfying glass still.

Is the pesky infant still around?

[mmuhler]

Hi
I totally agree as long as you do it in your own space and take responsibility whatever you want to do is cool with me but when its on a stage in a public place and you have kiddies running around the equipment one slip and its all over well that's a horse of different color.

[rszemeti]

Sadly not. Was zapped in the "DIY Atomic Pile" project when he failed to hang on to the half-sphere of plutonium as instructed.

[steve-o]

Ah.. well, easy come, easy go I guess ..