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There should be another lens inside the barrel (the part you can take off). Try cleaning that, and if that doesn't fix the problem then my only advice is to get a new one. 303 lasers are incredibly cheap, so trying to fix a serious problem just isn't worth it unless it's for learning purposes...

Looks like a dirty lens to me. Try unscrewing the top and cleaning the lens with alcohol using either a cotton swab or a fine-tipped (clean!) paintbrush. Don't press too hard (or you'll scratch the lens), but don't be afraid to apply a bit of pressure either.

Pretty much the entire soundtrack from Tribes: Ascend is my favorite. RIP best and most exhilarating game ever ;_;7 Also, the entire soundtrack from Elite: Dangerous is very well made and very fitting. Sometimes I'll just sit back and listen to the in-game music when not listening to radio...

I guess that makes more sense. Typically not associated with chemistry though, considering how NLO is a branch of optics, which itself is a branch of physics.

Did... Did you actually take chemistry? :crackup:

Wow, I can't believe I missed that. I really need to stop posting at 12 in the morning lol. :tired: The problem with your laser sounds like it might be temperature related. Try exposing it to different environments (e.g. warming it up with your hands or placing it over an air conditioner) and...

You laser is more than likely <500mW. It might be a bit more powerful than that, but it's certainly not 5W. It seems that you have quite an obvious disregard for laser safety as well. I strongly advise that you get an adequate pair of safety goggles before continuing with this project. Now, as...

Re: PERMANENT THREAD: Ebay& other internet FINDS of interest- read all the OP please Functioning ALC-60X with power supply and blower: Blue Argon-Ion Laser, Probably 488 nm, Works Great, Class IIIb Looks like it might need a bit of a touch-up, but it is in working order.

Voted yes obviously. I've always wanted a brain aneurysm.

LOL, I really hope you were wearing laser goggles for those. :crackup:

Re: PERMANENT THREAD: Ebay& other internet FINDS of interest- read all the OP please These big argons typically require 3-phase. They're cool to disassemble and all, but unless you have 3-phase power available you won't be able to actually use it.

Longer version (Contains violence and explicit language!): https://twitter.com/MiddleOfMayhem/status/796545047915331586 They stole his car too. Edit: I'd post a YouTube version, but they're removing all of the mirrors.

How do you even hold something like that?

There is nothing that makes the light that comes out of the headlights "laser light" unless part of the magenta laser (whatever that means) passes through the phosphor. As styropyro pointed out, fluorescence is the mechanism at work here. While lots of lasers operate on this mechanism, the...

Really? I was under the assumption that it was the other way around since 1064 and 1123 share the 4F 3/2 -> 4I 11/2 transition. Do you know where I could find the numbers for 1123? I can't seem to find them anywhere online. (without paying $40 per article anyway. :rolleyes:)

I have found that Lego is actually a very good platform, even for semi-precision work. I've used Legos to build everything from motorized translation stages to single-slit diffractors: It's obviously not suitable for sub-micrometer work, but its flexibility still makes it a very useful tool...

It's the weakest common line anyway. IIRC, it has an emission cross section of ~2*10^-20 cm^2 (I think, I couldn't find any sources to back it up though), compared to 1064nm's 28*10^-20 cm^2, with which it competes. It's less efficient than a 473nm of the same design for sure. Not sure about...

The 532nm process can reach a maximum theoretical efficiency of something like 48%, but to even attempt to get close to that you'll have to use a proper resonator. Microchip lasers are much less efficient than lasers utilizing standard cavities. (L/V/Z/Ring etc.)

I agree. Microchip lasers using periodically poled MgO:LN will barely achieve 10% efficiency, and that's for 532nm. 561nm without any special modifications would be ~1% at best.

Re: PERMANENT THREAD: Ebay& other internet FINDS of interest- read all the OP please That's not a road you want to go down unless you're prepared for it to consume your entire life (At least CW dye). Trust me, I speak from experience. inb4 "dye lasers on white carpet?!"