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Old 12-24-2011, 05:45 PM #17
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Default Re: Pointing an 8MW against a window at an angle

Quote:
Originally Posted by AAlasers View Post

That being said, it is probably more wise to suggest that one would assume all lasers to be highly dangerous, no matter the power level.
AAlasers
yeah i guess that is true, for the newbies.
Well honestly i am alot less careful with my low powered lasers then high powered.
i leave everything above the 10mW in a locked box. and my laser projector well....dont ignore the warning wich says "do not stare into the beam" :P


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Old 12-24-2011, 07:26 PM #18
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Default Re: Pointing an 8MW against a window at an angle

Thank you all for your feedback, surely if i'm asking if pointing an 8mw at a window can be dangerous, i realize how dangerous these things are. i've actually lurked around for quite a bit on this forum.

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Old 12-24-2011, 11:34 PM #19
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Default Re: Pointing an 8MW against a window at an angle

15mW reflected of a window gave this guy a blind spot:
My first eye injury...
Be safe with lasers, we're warning people for a reason.
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Old 12-25-2011, 01:00 AM #20
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Default Re: Pointing an 8MW against a window at an angle

Quote:
Originally Posted by Bluefan View Post
15mW reflected of a window gave this guy a blind spot:
My first eye injury...
Be safe with lasers, we're warning people for a reason.
Forgive me if i'm wrong, but it looks as he pointed the laser directly at his eyes and tried to "scan" them.

i'd be scared shitless if that happened to me, i'm paranoid about laser safety.
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Old 12-25-2011, 11:25 AM #21
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Default Re: Pointing an 8MW against a window at an angle

Quote:
Originally Posted by Bluefan View Post
15mW reflected of a window gave this guy a blind spot:
My first eye injury...
Be safe with lasers, we're warning people for a reason.
that link...

"This is view of the spot on the wall, very similar to what it looks like the beam hits your eye. If you see something like this, STOP IMMEDIATELY, but do not panic".

yeah right that means i actually may not watch my lasershows, unless he means the spot when the beam hits your eyes.

and this:
"“very fast scan will not damage my eye?” this is partly correct. Scanning faster will result in less eye damage. Even becomes save after a while. but this is all part of calculations of distance, power ect. you can can even get a 2W laser in your eye without getiing any eye damage. but then the laser has to be put far away, scans fast over your eyes, and has a large divergence.

I guess that link makes it for the newbies again who should be warned about to be careful with lasers.
But ofcource, if you get blind spots ect, then you have done something wrong, and you shouldnt do wrong in the first place.

Just saying this guy leaves out details, wich can scare people away.
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Old 12-25-2011, 09:53 PM #22
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Default Re: Pointing an 8MW against a window at an angle

I'm not saying that site is a master piece of work or that it holds the truth. I do however consider 20mW lasers dangerous and I advice to take safety serious. With all the watts around people seem to get sloppy on safety and push the limits of what they consider safe.

I'm not saying it's goggles or die, I've worked with a 5W Spectra Physics Millenia without the goggles for it. It was bolted to an optical table and the beam path shielded as recommended by the laser safety officer. It was a stationary setup, nothing was handled that came close to that beam.

Pointers however are different, just take a look at the sticky of Xoul in this section. In a professional situation Class 2 lasers are allowed for alignment, nothing more. Saying class 3A is safe is already stretching that up, but considering the small chance of eye damage that can be arguably justified.

So let me be perfectly clear: 20mW lasers are dangerous and 8mW lasers are dangerous too. Take the safety precautions applicable to a class 3b laser. I don't give a sh*t if anyone thinks I'm exaggerating, we're talking about laser safety here, not about your favorite flavour of lollipops.
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Highlights of my laser collection:
Big Sky Er:YAG - HP 8168D 1480-1570nm tunable laser source - Spectra Physics 3800 modelocked Nd:YAG - lots of IR diodes and bars - LPC-815 200mW 650nm - DL 6353TL 635nm 5mW - HP5501A stabilized HeNe - 2x Melles Griot 05-STP-910 stabilized HeNe - Spectra Physics 3500 Dye laser - REO 30536 543nm 2mW - Coherent DPY315-100 532nm 100mW SLM DPSS - Lexel 85 - 3x B&W tek 10mW 473nm - 445nm 3W Bluefan Sabre module - SF-AW210 150mW 405nm - DPSS inc 355nm 100mW Q-switched

Power meters:
Laser precision RkP-575 w/ RK-5710 - Ophir 10A-V2-SH - Ophir OEM 20C-A - HP 8152A w/ 2x 81521B - Coherent 212 - Anritsu ML93 w/ MA98A - 2x laser precision AM-400 - Leader LPM-8000

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