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Old 01-10-2017, 12:12 AM #1
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Default What should one expect to see while wearing safety glasses?

I just picked up a cheap eBay 405nm laser to play with. From what I understand, this model is putting out between 750mW and 1W (based on testing results posted on these forums and from a friend who put one on a LPM). It came with a set of glasses that look identical to these...

https://www.amazon.com/HDE-Protectio.../dp/B009T6RN0G

Being that these are Chinese glasses, I'm kind of nervous about them. I've never used safety glasses with visible lasers before (just IR) so I'm not 100% sure what to expect. I've seen these glasses recommended here but I've also read negative comments about them.

With the glasses on I cannot see the beam but the dot is quite visible (tested on non-reflective surfaces like carpet). The dot looks kind of redish with some blue fringing.

I'm wondering what I should expect to see if the glasses are actually blocking the proper frequency? Should the dot be visible?

I searched around and didn't find a definite answer to this question so I figured it was worth a new post.

Thanks!


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Old 01-10-2017, 01:25 AM #2
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Default Re: What should one expect to see while wearing safety glasses?

Quote:
Originally Posted by OpenTrackRacer View Post
I just picked up a cheap eBay 405nm laser to play with. From what I understand, this model is putting out between 750mW and 1W (based on testing results posted on these forums and from a friend who put one on a LPM). It came with a set of glasses that look identical to these...

https://www.amazon.com/HDE-Protectio.../dp/B009T6RN0G

Being that these are Chinese glasses, I'm kind of nervous about them. I've never used safety glasses with visible lasers before (just IR) so I'm not 100% sure what to expect. I've seen these glasses recommended here but I've also read negative comments about them.

With the glasses on I cannot see the beam but the dot is quite visible (tested on non-reflective surfaces like carpet). The dot looks kind of redish with some blue fringing.

I'm wondering what I should expect to see if the glasses are actually blocking the proper frequency? Should the dot be visible?

I searched around and didn't find a definite answer to this question so I figured it was worth a new post.

Thanks!

Depends on the glasses, with 405nm (And blue to a lesser extent) you'll usually see a fair bit of orange/red light with these glasses as 405 fluoresces everything it comes in contact with. You shouldn't see the actual wavelength of the laser really though as that should be blocked for the most part.

Part of the reason I recommend proper certified glasses rather than these cheap ones, you can depend on them, you don't need to worry about if they are working or not.

TL;DR You're probably fine, but I advise spending the ~$45 on the Eagle Pair from Survival Lasers - better safe than sorry.
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Old 01-10-2017, 10:09 AM #3
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Default Re: What should one expect to see while wearing safety glasses?

The one's you linked are true HDE's which are pretty good for the money are Anzi certified are OD+4 plus marked on the arms. That's where it ends as the usual throw in a kit China ones just have the look of them but are flimsy and have no markings.
I'm not against getting a Survival Laser pair by all means but the price just detours some.
While you have the link up, why not get a pair of them at $10 and at least you will have better piece of mind. Even get 2 for the same shipping price because there's always friends around who also need them.
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Old 01-10-2017, 05:14 PM #4
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Default Re: What should one expect to see while wearing safety glasses?

The one's I have are embossed with ANSI Z87.1 on the lens and on one arm. No OD markings. Looking at the pictures they seem identical but... After doing some reading I went ahead and ordered a pair Uvex SCT-Orange glasses to try. From the tests people have done, I feel safer with those than the Chinese glasses to be honest.
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Old 01-10-2017, 05:20 PM #5
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Default Re: What should one expect to see while wearing safety glasses?

Regarding the goggles, an amazon review says this.

"I got two pairs of these glasses: one red (blue-blocking) and the other blue (red-blocking) for some lasers I have. I also got a lux meter. I took my 405 nm laser pointer, put it directly on the surface of the sensor, and fired it for several seconds, recording the peak value I got (26000 lux, in this case). Then I put the red glasses between the laser and the sensor and recorded the peak value again (320 lux). I then calculated the OD: log(26000/320) = 1.91.

I then tried the same thing with a 650 nm laser pointer and the blue glasses. They did even worse: the laser was 53000 lux unshielded, 2300 shielded by the glasses. OD = log(53000/2300) = 1.36.

Lux meters do correct for human visual response, but this isn't an issue when you're testing monochromatic light sources like lasers before and after passing through a filter. The correction factor appears in both the numerator and denominator of the ratio, thereby canceling out.

I'll give these 2 stars because even a factor of 20-100 (OD 1.3-2.0) can easily mean the difference between being going blind and not, plus they are very cheap and do look cool. But laser safety glasses really need an OD of at least 4 to provide safety with high-powered lasers. Look elsewhere if you're dealing with any lasers above 100 mW or so. "


Whether or not this is true is another thing but I'm pretty sure eyes are worth slightly more than $45.
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Old 01-10-2017, 05:33 PM #6
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Default Re: What should one expect to see while wearing safety glasses?

Yeah, the reviews for the HDE's is what put me off them (and why I ordered the UVEX glasses to try).

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Old 01-10-2017, 05:42 PM #7
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Default Re: What should one expect to see while wearing safety glasses?

You really only need one and at most two to cover all the possible wavelengths exception 10.6um.
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Old 01-10-2017, 05:44 PM #8
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Default Re: What should one expect to see while wearing safety glasses?

Sorry, I did an edit! I thought you were talking about a review on the Uvex SCT-Orange but you meant the HDE's. I only need one frequency but multiple pairs so my friends and family don't get blinded either!
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Old 01-10-2017, 07:04 PM #9
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Default Re: What should one expect to see while wearing safety glasses?

I don't think your pen would be outputting 1W in such a small host. It just seems unlikely due to the heat it would generate

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Old 01-10-2017, 07:08 PM #10
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Default Re: What should one expect to see while wearing safety glasses?

It's one of these...

New Aluminum 1W 405nm Blue Laser Pointer Pen Power Beam Burn Cigarette + Glasses

A friend has one and it's putting out 1W. I read some other tests here and they were in the 800mW to 1W range.

Not something I want in my (or anyone else's) eyes for sure.
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Old 01-10-2017, 07:20 PM #11
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Default Re: What should one expect to see while wearing safety glasses?

Quote:
Originally Posted by OpenTrackRacer View Post
It's one of these...

New Aluminum 1W 405nm Blue Laser Pointer Pen Power Beam Burn Cigarette + Glasses

A friend has one and it's putting out 1W. I read some other tests here and they were in the 800mW to 1W range.

Not something I want in my (or anyone else's) eyes for sure.

Going by some of the specs listed there I'm not sure I'd believe it's 405nm.

  • Rank: Class III A
    (1W is now Class III A? )
  • Of-Off Mode: Pressing the Switch
    (Of-off? Also, duh?)
  • Start-up Time: 6M
    (6 Minutes start up...?)
  • Beam Dimension: 500-10000
    (500-10,000 what!? There's no units ... what does this even mean???)
  • Wavelength: 405nm




As long as you're happy with the purchase OP, price is reasonable for what it is.
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Old 01-10-2017, 07:36 PM #12
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Default Re: What should one expect to see while wearing safety glasses?

Ha! Yeah. I didn't even look at the specs. The color seems right for 405nm but who really knows. The only reason I got it is because a friend just got one and it seemed decent (and tested at 1W on another friends LPM) and I had some eBay bucks to spend.

Looking forward to checking it out more once the Uvex glasses get her tomorrow.
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Old 01-10-2017, 08:42 PM #13
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Default Re: What should one expect to see while wearing safety glasses?

Quote:
Originally Posted by diachi View Post
Going by some of the specs listed there I'm not sure I'd believe it's 405nm.

  • Rank: Class III A
    (1W is now Class III A? )
  • Of-Off Mode: Pressing the Switch
    (Of-off? Also, duh?)
  • Start-up Time: 6M
    (6 Minutes start up...?)
  • Beam Dimension: 500-10000
    (500-10,000 what!? There's no units ... what does this even mean???)
  • Wavelength: 405nm




As long as you're happy with the purchase OP, price is reasonable for what it is.
Obviously listed as 3A to get around eBay's rules.

But seriously, what the hell are those dimensions?
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Old 01-10-2017, 08:45 PM #14
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Default Re: What should one expect to see while wearing safety glasses?

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Old 01-10-2017, 08:48 PM #15
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Default Re: What should one expect to see while wearing safety glasses?

Quote:
Originally Posted by Crazlaser View Post
Obviously listed as 3A to get around eBay's rules.

But seriously, what the hell are those dimensions?
No, obviously not, as the title quite clearly says "1W".
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Old 01-10-2017, 09:06 PM #16
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Default Re: What should one expect to see while wearing safety glasses?

Yeah, that was surprising. I'm not sure how they're getting away with it. Other listings for lasers (like the Thor II) say 5mW but have pictures showing over a watt on a laser power meter.

Quote:
Originally Posted by diachi View Post
No, obviously not, as the title quite clearly says "1W".
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