Ugly Dougly wrote:
Most laser pointers are unlikely to cause permanent eye damage.
BetaBox wrote:i took it upon myself to remove the 700mw blue laser from the Dalek because of said potential for eye injuries. Some people do try to be responsible....
marck wrote:Being an owner of one of the first handheld .5 W green lasers on the playa back in something like '08, I found myself getting headaches when I was fooling around with it at home.
I looked into what might happen if the beam was pointed into someone's eyes. Most of it was probably a splash effect, some of it might have been IR radiation.
I would bet you six cases of PBR that most of the visible laser pointers on the Playa are powerful enough to cause damage within half a second of hitting the retina, and this is just the visible light.
marck wrote:Just make sure the wind is playing on your side, and let the innocent bystanders be damned.
Mr.Coffee wrote:and Ugly Dougly, I agree that "most" might be safer at this point in time, but that almost every one I saw out on the Playa was well over 5, most 300-500, and a few near 1w.
gyre wrote:Never got a reply notice to this thread. ??!
BBadger wrote:I suspect that most of the handheld green lasers on the playa were about 30-50mW in power, as they're in that sweet spot where the laser remains portable, and relatively cheap.
Savannah wrote:It sounds freaky & wrong, so you need to do it.
Mr.Coffee wrote:The IR component can vary quite widely, based especially on internal alingment of the laser. Most of my experience in this realm is with DPSSL lab/show lasers, but I know the pointers are of a very similar construction. A cheap laser that can be knocked out of alignment which also has little or no IR filtering (which is omittied in cheaper models due to heat build up, etc), can output a significantly higher amount of IR than visible light, due to the nature of the design.
junglesmacks wrote:I'm betting not. I'll bet you a round of drinks that 98% of all those green lasers are the same, 5mW pen laser with just a fake rating on them. There is a flood of them coming in from China. I fell victim to it twice.. once thinking I was buying a 50mW, and again thinking I was buying a 100mW. They are all the same.. exact.. 5mW pen laser.. just with fake tags on them.
firstname.lastname@example.org wrote:Jim Bowers (clock artist): Prior to the event, we acquired an FAA variance alerting all aircraft in the vicinity and we obtained a permit/docket number from the FDA which regulates Laser Shows in the State of Nevada. Our laser were also never less than 45' off the ground and angled upward by 1 degree. You may have noticed them sweeping across the nearby mountainside. We also used beam expanders which caused the lasers to "diverge" and expand to a "safe level" as they passed over BRC. When the hour laser was hitting the Crystal we installed in the Temple, it was approximately 18" in diameter in order to avoid reflected beams thru the defraction grating film on the Crystal. - Jim
gyre wrote:We examined a laser sold as green, which was a red laser converted to green.
I think this amplified it's effective output at the same time.
The manufacturers didn't care about regulations.
Impressive results, but far brighter than legal.
Risky wrote:I was warned about the blue ones this year, from a friend who makes lasers and has put on several shows this summer in Reno.
He suggested high rated UV protection glasses to protect your eyes from injury.
There are available in shades or clears.
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