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it's in English for me. 50mW - Jetlasers.org, Online Shop for Jetlasers Products.

Haha the idea is great but what I would've done is bought a cheap lightsaber prop. Safer, cheaper and much more visible.

Hah yeah I looked it up, you're right. And your calcs look right but don't take my word for it. I've been wrong before :p

Wow that Aquarius looks amazing.

I think 1M is the old system. Nowadays it's the Class I, Class II, Class IIIa, IIIb and Class IV. AFAIK 1M is equivalent to Class I, which is any laser which would not cause damage to the eye under normal conditions of operation, which is any laser that is enclosed while in operation or below...

Not hard. Open the freezer door, match in a bottle, just after a hot shower. There's fog of all sorts everywhere. Just got to find it.

Umm diffraction gratings? Everyone likes stars. At least I hope so. You want an adjustable variable though. Umm. You could try slit diffraction. Have a few wavelengths and show what effect changing the wavelength has on diffraction. Or you know, burning. What burns best and all that. Change...

The 3-5% was a general question directed at persons more knowledgeable than me on the subject. The new diode greens are just that, new, and so the technology isn't exactly mature. They have lower efficiencies than the more well established and widely used lasers which have been around for...

Have you thought that maybe it might be the camera? Perhaps the human eye is limited by the vanishing point, whereas the camera is additionally limited by the brightness of the beam as it progresses? Certainly the beam at a hundred metres away would be dimmer, and a camera may be unable to pick...

If that were true then wouldn't the beam appear longer if you had it at an angle to the sky, as opposed to perpendicular to the sky (well, as perpendicular as you can get it, anyway). From my experience, it doesn't seem to. @OP Regardless, yes, what Atomicrox said is quite right in that all...

I hate to be banging on about something everyone else has said, but a bit of searching goes a ways. For example, search threw this up for me. http://laserpointerforums.com/f53/need-good-glasses-87064.html All the suggestions about glasses you'd ever need.

Oh that post wasn't directed at you (the whole thing about dumb idiots and planes. Unless you've intentionally hit a plane with one then judgement not reserved). But yeah, modules are good and easy to play with. Just hook up the right voltage and watch it go. If you've got an Eclipse mint tin...

I uhh.. I'm not too sure, but I think there might be a dichro in there. It was a CD/DVD reader so there were probably two laser diodes in there, an IR for the CD and a red for the DVD. They probably aligned the two so that the lasers came out of the same lens, as it were.

sorry haha offtopic there. Just a little frustrated with the crazy laws on laser imports and the whole attacks on planes things. Speaking of which your module should be just fine, although you might want to double check if you've got a spring on the Fasttech module (last I checked none of the...

And to me it doesn't seem as counter-intuitive as it sounds, as if you're responsible enough to use a soldering iron/tools the chances are marginally higher you're not big enough of an idiot to shine it at planes.

I was demonstrating the fact that Australian customs does indeed allow modules, as evidenced by the fact that I had received a violet module over the 1mW limit myself. Not suggesting he buy it. EDIT: Read over this and realised I sounded a little abrupt. No hostility meant or anything.

Yeah modules are allowed. Got in a violet module from Fasttech. (says 5mw, no idea what it actually is). EDIT: Oh yeah forgot about this, but expect a looooong shipping time. Took mine a full month to arrive.

Don't they already have those? (The projected keyboards) I think they're called piezoprojectors or something.

Isn't there stuff floating about in vinegar? Will that not get deposited on the lens after cleaning? I too am interested in this, actually. Also, is there any way to tell what a lens is made out of? (If it's sitting in a module).

Really? www.google.cn works and so does www.google.com.hk Sorry it's a bit offtopic, just curious if Google.cn would have a reason to exist if China blocked it.