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Old 09-26-2010, 05:04 AM #17
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Default Re: 100% uv sunglass blocks 405nm

YLW - UV and Near UV Protection YLW - UV and Near UV Protection [NR-YLW-EN207] - $98.60

These will keep your eyes safe, and allow you to see the phosphorescence of the diamond.


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Old 09-26-2010, 05:34 AM #18
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Default Re: 100% uv sunglass blocks 405nm

Hmmm... same website has glasses built specifically for bluray... I likey- it would let the blue- green- teal- glow come through, but stop UV and violet down to 410nm...
thanks for the link.
BD1 - Blu Ray Diode Protection BD1 - Blu Ray Diode Protection [NR-BD1-EN207] - $122.40
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Old 09-26-2010, 08:19 PM #19
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Default Re: 100% uv sunglass blocks 405nm

I tried this with a pair of Blue Blocker sunglasses from a department store. Rated 100% for UV A & B protection. I had an overspec 5mw 405nm pointer. Leaving the store I put them on and ....no blue sky! Got home and decided to test them before wearing them as protection. Not a proper test I assure you, but one that should indicate something. I set them on the bench with a target abt 2" behind them. Fired the pointer through them at abt 4" in front of the glasses. WTH? It was like they were clear! I saw NO decrease in the dot at all and that is visible 405nm. They may block unseen incoherent UV but for 405nm laser safety glasses they are worse than useless, they are dangerous if you assume they are blocking the "bad part" and use them.
My son(19) was with me when I purchased them, knew why, so I took him in for a little demonstration. He immediately asked if these were his to wear in there. NO, they are not allowed in this room and here is why. Retest time and his mouth actually dropped open.
My son wears them now to drive his car.
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Old 09-26-2010, 09:48 PM #20
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Default Re: 100% uv sunglass blocks 405nm

UVA goes from 400 nm–315 nm
UVB goes from 315 nm–280 nm

The blu-ray diodes can vary from 400nm-410nm. The only trouble is you do not know what your diode really is. Also the glasses are not made for concentrated laser light, they are made for sunlight. So IMO I would not gamble your eyes on some cheap sunglasses.
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Old 09-26-2010, 11:44 PM #21
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Default Re: 100% uv sunglass blocks 405nm

My point exactly TJ. That's why my son has a new pair of driving glasses for his car. lol
That was back in my extreme noobness to lasers and I wanted to share what not to do.
I bought a pair of "real" glasses.
In one of daguins posts he talks abt the eyes lens yellowing with age. Yes, I do read a lot here(well worth the donation too!). I had dual cataract surgery @ 52yrs old so flares, flashes & reflections are bright to me with non aged clear lens in my eyes.
Toke was very helpful in directing me to a pair that suppressed the IR in my cheap greens I have and was concerned abt. I couldn't +rep him for that due to some time between +reps to the same person, but I owe him one.

When ppl describe say 445's as blue, I'd hate to see them take the word of a cheap box that says Blue Blockers and think they are safe.
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Old 09-27-2010, 07:16 PM #22
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Default Re: 100% uv sunglass blocks 405nm

Quote:
Originally Posted by daguin View Post
If you use hand-held lasers (especially inside), you WILL eventually be hit in the eye with a specular reflection. After it happens is too late to put on your goggles.

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And that's even more true while wearing goggles. Knowing you are protected you tend to be a bit less careful and risk a bit more. But that kind of confidence can only be given by certified protection.
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Old 09-27-2010, 08:00 PM #23
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Default Re: 100% uv sunglass blocks 405nm

I have a small blind spot in my upper right eye from a reflection of a 20mW 532nm laser. So it doesn't take much.

You are right about feeling safe with certified goggles. When I'm focusing down to a small point I catch my eyes opening up all the way.
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Old 09-27-2010, 10:31 PM #24
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Default Re: 100% uv sunglass blocks 405nm

UV blocking sunglasses probably rely on the absorbsion of the material for the uv range, which is usually just below 400nm for glass (plastic probably not very different). 405nm will probably pass just as much as the rest of the visible light, which is only attenuated by the dye in the material, but that only blocks around 60-90% of the light, depending on the specific glasses.
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