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Old 02-02-2011, 12:16 AM #1
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Default 3D Glasses Very High OD?

Hey, so I purchased 3D glasses for legitimate use, however I decided I wanted to try my laser through it also because I have read things about it. First let me note that these are hard plastic glasses, not the cheap paper ones with a soft lens that can melt. So I decided to shine my 50+mW green laser through the red side, absolutely nothing penetrated. I then tried turning the lights off and lasing with them on and only an extremely faint dot is visible, and only at close range. The lens is darker than my laser glasses and doesn't seem to melt or anything after prolonged exposure due to it being hard plastic.

I understand it is never a good idea to use glasses designed for something else, for lasers, but these things must have a very high OD rating if tested to only allow such a small bit of green through. I just wanted to share this because I thought it was very cool how glasses not even meant for this type of thing, can take out the laser much better than my laser glasses.

I assume it still wouldn't be safe to use these for high powered lasers if both sides were red, but I honestly don't see why not. It may not be rated, but neither are half the laser glasses out there.

These laser glasses were $5.00 shipped.

Amazon.com: Red-blue / Cyan Anaglyph Simple style 3D Glasses 3D movie game: Toys & Games


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Old 02-02-2011, 12:37 AM #2
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Default Re: 3D Glasses Very High OD?

I've noticed the same with some red or orange colored, clear plastics, specially rear car lights,
like turn signals or stop lights.
Some really block the crap out of 532nm....

You'd imagine they let through the IR completely, then again, so do most "normal"
anti-green laser safety goggles.
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Old 02-02-2011, 12:43 AM #3
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Default Re: 3D Glasses Very High OD?

They might be worth it for a backup/spare pair with lower-powered pointers, but I wouldn't want to rely on them as my primary goggles. A decent test is 10s direct exposure without bleaching, whilst maintaining minimum OD, if I recall correctly.

Good find - hopefully if anyone else tries these as a backup pair, they'll exercise the same judgement, test them, and get glasses of comparable quality.
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