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Old 05-20-2014, 04:36 PM #1
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Default Is it a good idea to buy cheap laser goggles off ebay?

I am going to work with a Sony SLD1239JL-54 diode. From what I read, the diode is 650 nm and is a class IIIb. (Here is the data sheet for more info http://www.b0f.com/Laser/Data/SLD1239JL.pdf). The driver for it is going to range from 12mA to 420mA. I found a 650 nm safety goggle off ebay that is only $7.99. I just want to know if there are greater risks buying goggles that cheap or from a site that is not directly from the manufacturer? Here is the link for it that goggle that I have found. 650nm 660nm Red Laser Protection Goggles Safety Glasses | eBay Please tell me whether or not I am being scammed or if this is the wrong type of goggle for it. Thanks.



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Old 05-20-2014, 07:16 PM #2
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Those may be fine for low power lasers, but often cheap glasses like that aren't even laser glasses, just normal safety glasses.
What I suggest is you buy a set of Eagle pair glasses from survival laser.
I know they are more expensive, but trust me it is cheaper than costly eye repair.
Just stay away from those generic glasses and buy Eagle pair.
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Old 05-20-2014, 07:24 PM #3
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Default Re: Is it a good idea to buy cheap laser goggles off ebay?

The very cheap uvex and no brand glasses are good up to about 300mw

Then you should invest in better glasses, for your safety.


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Old 05-20-2014, 08:53 PM #4
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Default Re: Is it a good idea to buy cheap laser goggles off ebay?

Most cheap goggles for reds are more than fine. Also got a cheap pair and I canīt even see a red dot from my 500mW through glasses. Only when shining on a white surface directly in front of me.
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Old 06-05-2014, 03:21 PM #5
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Default Re: Is it a good idea to buy cheap laser goggles off ebay?

I also bought a 300mW 660nm laser diode and cheap blue goggles on eBay.
I did an experiment:
I pointed the (un-focused) laser to a photo cell and measured 160mV.
Then I put the goggles in the way and got 90mV.
Ambient was low, I checked and didn't make any significant difference.
I feel those goggles should have attenuated more and therefore are not really "laser" goggles, just colored.
However I'm new at this so I can't tell if my measurements are relevant; can anybody comment?
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Old 06-05-2014, 10:49 PM #6
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Default Re: Is it a good idea to buy cheap laser goggles off ebay?

Those cheap goggles should be fine but get something better when you can.

Cata, in my opinion that is probably not a very accurate way to test those goggles. The best way is to use a laser power meter and shine a focused beam directly through the goggles at the LPM sensor.

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Old 06-05-2014, 11:02 PM #7
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Default Re: Is it a good idea to buy cheap laser goggles off ebay?

If buying a cheap one I would use http://www.amazon.com/DEWALT-DW0714-.../dp/B00093DJ4M These work pretty well but I have NOT tested them for a 650. They are red filtered so they will filter anything below that general range of red. Just dont use the same wavelength or higher. I hope this helps, but I might check some of the more reliable options.
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