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Thanks Sta! I'll pick up a diffraction grating to have a look for that elusive 6th line. :) Is something like this good? Diffraction Grating Slide Holographic Linear 1000 lines/mm Lamp Laser Spectrum Also, if anyone happens to have a copy of the manual for this laser squirreled away, I'd...

Hi LPF! Guess what showed up? That's right, my new Argon laser! Thanks again to Sta for the excellent eBay suggestion. :thanks: It actually arrived two days ago, but I had family in town so I had to wait until today to do a proper run. I picked up this laser with a matching 2102-25ML power...

Re: PERMANENT THREAD: Ebay& other internet FINDS of interest- read all the OP please Ugh, Sta. Why are you always making good suggestions?! I'll post a full thread when it arrives. Ouch, my wallet!

After mine has warmed up, it will power on almost immediately. When it has not been used overnight, though, it will take a few seconds to lase. I just tried it and counted almost exactly 10 seconds from power up to beam. I'll keep that in mind if it ever goes beyond 10-15 seconds!

Maybe just make a post in General and link to that? If you include enough cool information, maybe you can even get it stickied! :)

Re: FS: Sanwu Laser store - R/G/B handhelds x3 BE & Stainless steel "The Spiker" rele Have you considered something with an M462 diode? :)

To be honest, I could probably make it work, but I need some excuses to not jump in with both feet. :) Anyway, I'd rather look before I buy if anyone happens to be nearby. If not, I guess I'll have to wait for next year's NWLEM or something.

I'm more worried about the space and power requirements, since I live in a pretty small apartment. The little HeNe is already taking up a significant amount of my hobby space. :) If I saw one for a great deal, though, I still might have to jump on it.

Is anybody here in the San Francisco area? I want to check out what an Argon looks like in real life, but I don't think I can justify buying one for myself. I can offer +rep and a 6-pack if someone would let me swing by some day after work and watch them fire up the flamethrower. Plus I'll carry...

When I first fired it up, it took about 10 seconds to start lasing. At first I thought this was some kind of safety feature, but when I started it a second time it came right on. It also does this "stutter" when it powers off, where the tube clicks a few times and the beam flashes on and off, I...

Steve, I think you're confusing energy per photon (which is indeed wavelength dependent) with energy per unit time (aka power), which is independent of the wavelength. Photons have E=hf energy, where h is the Planck constant. A 405nm photon has Ea = hc/405e-9. A 635nm photon has Eb = hc/635e-9...

The Convoy L6: https://www.fasttech.com/products/1653/10002364/5184101

Hi LPF! I recently asked what made HeNe interesting, and the answers convinced me to pick up my own HeNe and see for myself. :) I got a 1mW Gammex alignment laser (model 1A475), manufactured in February 2005. This laser was originally used to align radiotherapy machines. As I understand it, the...

Re: PERMANENT THREAD: Ebay& other internet FINDS of interest- read all the OP please I bought it. Thanks for the info :)

Sam's laser FAQ has a good page discussing laser safety, although it almost entirely deals with collimated beams. It does say this: "A collimated beam is the most dangerous since it can be focused to a microscopic spot on the retina. A highly divergent beam - even a high power one - is much less...

Re: PERMANENT THREAD: Ebay& other internet FINDS of interest- read all the OP please Any thoughts about this little fan-cooled 405nm labbie? 405nm 500mw Square High-power Blue Violet Laser Adjustable Focal Laser Head Lamp Is it likely to actually be 500mW? What diode is the seller most likely...

Hey, I just watched that video, and those glasses really don't look like Eagle Pair. Am I wrong? https://www.youtube.com/watch?v=4Y87OiN1y34&feature=youtu.be&t=31s

Oh, that's interesting! Can you recommend any good sources to learn more about optics like this? Undergrad was a while away. That makes sense, but why is this different for an LED? The rays that manage to hit my eye should still be pretty parallel, right?

Coherent light just means that the light waves are in-phase and have the same frequency: https://en.wikipedia.org/wiki/Coherence_(physics) The laser diode rays are definitely not parallel (or even nearly so) or the size of the spot on my wall would not be ~1 inch at a few inches and 42 inches...

This definitely seems to be true for a laser beam, but the output of a multimode laser diode without a focusing lens is not a beam - it is a cone with a high divergence, just like a power LED. If the rays were already parallel, we wouldn't need a collimating optical assembly to form a laser...