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    Cyonics/Uniphase 2201-25ML Multiline Argon

    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...
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    Cyonics/Uniphase 2201-25ML Multiline Argon

    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...
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    PERMANENT THREAD: Ebay& other internet FINDS of interest- read all the OP please sub

    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!
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    Gammex Alignment HeNe

    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!
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    Please eliminate signature size limit for veterans

    Maybe just make a post in General and link to that? If you include enough cool information, maybe you can even get it stickied! :)
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    FS: Sanwu Laser store - RGB handheld lasers, 405nm,445nm,465nm,470nm,505nm,515nm,520nm,525nm,635nm,650nm

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

    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.
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    Remember to exercise those argons!

    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.
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    Remember to exercise those argons!

    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...
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    Gammex Alignment HeNe

    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...
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    405 vs 635 burning question

    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...
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    Is an unfocused 4W laser do dangerous at 5 meters?

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

    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...
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    PERMANENT THREAD: Ebay& other internet FINDS of interest- read all the OP please sub

    Re: PERMANENT THREAD: Ebay& other internet FINDS of interest- read all the OP please I bought it. Thanks for the info :)
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    Is an unfocused 4W laser do dangerous at 5 meters?

    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...
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    PERMANENT THREAD: Ebay& other internet FINDS of interest- read all the OP please sub

    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...
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    So I bought from Lucklaser....

    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
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    Is an unfocused 4W laser do dangerous at 5 meters?

    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?
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    Is an unfocused 4W laser do dangerous at 5 meters?

    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...
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    Is an unfocused 4W laser do dangerous at 5 meters?

    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...




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