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Old 01-22-2017, 04:00 AM #1
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Default Choosing safety glasses

They are rather expensive (I know, no price on eyesight..) so I thought I'd try various cheaper ones first, sending back those that are no good.

But what will be good / no good?

I wondered if there was any chance of people kindly donating pairs of comparison pics of: A beam hitting a white target, and: The same but with the beam having passed through one of their (known to be good) spectacle lenses on the way? Together with the specification of the glasses? So that I know the kind of attenuation I should expect?

At the moment I'm using a 650nm red, but may move to blue for greater burning power.

It would no doubt be useful to other people, too.

Thank-you very much!
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Old 01-22-2017, 05:24 AM #2
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Default Re: Choosing safety glasses

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Old 01-22-2017, 09:30 AM #3
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Default Re: Choosing safety glasses

Ok thanks for that, but it won't help me evaluate a pair that arrives in the mail, to see if they're any good or not!
If possible, I'd like a pic that shows the beam before and after being attenuated by known good glasses, so I know what kind of effect to look for in an affordable (for me) cheap pair!
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Old 01-22-2017, 10:22 AM #4
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Default Re: Choosing safety glasses

You should spare no expense when it comes to your safety. These eagle pair are a wise choice
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Old 01-22-2017, 10:42 AM #5
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Default Re: Choosing safety glasses

I do NOT recommend T-Rex glasses... They do not protect sufficiently. I tried to hit it (not wearing them of course) with 5 mW - it passed quite a lot. Then I tried something about 100 mW and it was definitely much more than 5 mW after pass. These have been suggested for 1 W laser - no way...
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Old 01-22-2017, 10:53 AM #6
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Default Re: Choosing safety glasses

See?? Please, not an argument about what's best, just a way for me to evaluate a cheaper pair! Does anyone have some good ones, that they can demonstrate the difference they make in a pic?
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Old 01-22-2017, 11:21 AM #7
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Default Re: Choosing safety glasses

GR, read your visitor message.
Guys don't kill me as he's set on not paying much and these are better than nothing.
The only pair I will recommend from Fastech.
I got some as backup's and really ended up using them myself quite a bit.
OD+4 as they rate and CE "F" certified projectile protection is printed on the arm.
Will work over reading glasses.
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Old 01-22-2017, 06:37 PM #8
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Default Re: Choosing safety glasses

GSS: Sorry, didn't see the message. It's not a case of me being mean, it's a case of having to budget. If I can find good glasses cheap it wouldn't make sense not to.
I intend trying as many as I can find, one at a time, until I either find a good pair, or run out of ones to try in which case I'll have to save up for an expensive pair.
So, eg, should they block a 5mW laser pointer altogether? How about the beam from my LPC-836 (200mW)?
Thank-you,
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Old 01-22-2017, 09:34 PM #9
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Default Re: Choosing safety glasses

I'm not sure about Eagle glasses - I have quite expensive Univet goggles but even with them you can see (but very little almost not noticeable) 5 mW 532 nm. It looks not green, but yellow-orange and even (overspec) 3.5 W 445 nm looks yellow-orange dot. Just dot no halo, it is not bright... They are over OD 6 for these wavelenghts. So, I assume even Eagle glasses will not block it 100 %. You can use some brick to block 100 %, but not sure how comfortable it is.
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Old 01-22-2017, 10:27 PM #10
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Default Re: Choosing safety glasses

I have these and they work great.

Eagle PairŪ 190-540nm & 800-2000nm Laser Safety Goggles
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Old 01-22-2017, 10:30 PM #11
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Default Re: Choosing safety glasses

Quote:
Originally Posted by Crazlaser View Post
Exactly
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Old 01-23-2017, 12:06 AM #12
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Default Re: Choosing safety glasses

Radim - thanks! That's exactly the kind of thing I was hoping for.
Crazlaser & HydroSean - What is the subjective effect of them, eg on a 5mW / 200mW / 3.5W beam?
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Old 01-23-2017, 12:13 AM #13
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Default Re: Choosing safety glasses

Those are OD4 which is a reduction by 10,000 times. A 3.5 watt laser would be less than 1mw. That goes without saying, never look into the beam and take the same precautions as you would with them off. But feel free to look at the dot and if you get a direct hit you'll be okay.
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Old 01-23-2017, 01:01 AM #14
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Default Re: Choosing safety glasses

To add: The OD is only for radiation other from direct hit (especially for high power), for direct hit protection other things like material of laser lilters etc. must be taken into consideration. So, there are also LB measures along OD for this. To make it more complicated - LB are separated into continuous and pulsed lasers.

Even with goggles or glasses never look into beam. If you got hit check your sight and glasses filters for damages before you use them again - might not be issue for 200 mW - but it is for 3.5 W. I saw what it does to mentioned T-Rex glasses.
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Old 01-23-2017, 01:26 AM #15
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Default Re: Choosing safety glasses

Don't risk your eyesight with cheap unknown glasses, it's very stupid to even think about comparing cheap glasses as the dye lots can change and what you test today could be way different later, buy from a trusted source.

Many here use these as do I, they are not expensive, hell 1 trip to my eye Dr. is over 100 dollars just for the office visit.

CLICK >>>>>> Safety Goggles

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Old 01-23-2017, 01:48 AM #16
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Default Re: Choosing safety glasses

To the OP, basically, no one here is going to recommend you anything less than eagle pair because we don't want them to not work by accident, you get hurt and have your life impacted. If you choose to use cheaper goggles, find them yourself and wear them at your own risk.
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