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Old 06-05-2012, 06:45 AM #1
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Default Goggles for working with RGB projector?

Hi all! I've read through a bunch of the stickied threads in the safety section, and I think I've got a healthy amount of being freaked out about eye safety in my system. I was initially planning on starting with a 1W blue projector, but decided to go with a 1W total RGB thinking that the individual colors would be less scary since each laser on its own is much lower power (though 500mw still is quite scary!). The specs on the one I've got on the way are: R500mw/650nm, G150mw/532nm, B400mw/450nm. It's a random chinese one, so I'm expecting the actual output to be lower, but that's the numbers I'm working off for picking the goggles.

So, flipping through options on OEM Laser Systems or Survival Laser, I realized I may have made a mistake in going RGB... I couldn't find any goggles that covered that range (440ish-660ish). Some extra thinking, I realized that if you're trying to block the full RGB spectrum, that wouldn't leave much actually able to be seen.

Do they actually make ones that would help across RGB that I'm just not seeing? If not, should I just pick goggles covering at least the G/B range and disconnect the R laser while I'm first starting out?

Any recommendations would be greatly appreciated. Thanks in advance!
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Old 06-05-2012, 06:52 AM #2
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Default Re: Goggles for working with RGB projector?

Why do you need goggles? The only time you'd really need them is if you're fiddling around inside the projector/aligning it etc, using goggles to watch it kind of defeats the purpose.

But, on topic, the only RGB goggles I know of are well, bricks

You need to just be cautious when you're working on the projector, and know where beams could end up if something goes wrong. For example, while you're aligning beams, make sure that if a beam bounces off something in the projector, your head isn't in it's reflected path. Do not work directly overhead the galvo block, being direct mirrors they'll take any chance they can get to blast a beam right into your face.

When using the projector, just be sensible about it and you won't need goggles. Shine it well above your head, and watch the show from below. There are ways you can safely sit amongst the beams, however you'll require some fairly expensive software and DAC combo to achieve it, so it's safest not to.

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Old 06-15-2012, 02:44 AM #3
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Default Re: Goggles for working with RGB projector?

Also, if you want to work inside the projector (e.g. to re align it), use your software to fire up one or two lasers at a time. This way you can use a pair of blue/green blocking goggles while working with the 532 and 445, and then switch to a blue/red set of goggles when working with the 445 and 650.

I would work with goggles inside a projector of unknown quality. I wouldnt want to touch something inside without wearing them, finding that part moves or falls off, and in the process sends a full power beam right at my face.

For watching the shows, you dont need goggles. Things advice is correct. Orient the laser such that the projection cannot hit you, and you can sit back and enjoy the lightshow
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Old 06-07-2013, 07:33 AM #4
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Default Re: Goggles for working with RGB projector?

so basically we'll be taking chances when we work with RGB lasers .....
Question.
Can we simply overlay 2 goggles over each other to get full coverage?
Yeah yeah , I won't be able to see much through the goggles ,but at least my eyes won't be like this.
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