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I use a Melles Griot Beam Dump. It has a gigantic 2 inch aperture and eats beams like candy. Here are some pics of it snacking on my Argon (488nm). Bill

Hey Everyone, Attached is the CLEO 2011 brochure. If anyone is interested in attending, the exhibit pass is free. CLEO is again in Baltimore MD this year. The exhibits were really good last year with Coherent, Newport, Melles Griot, CNI and many other showing off their wares. Thanks, Bill

It would take a few mods and a midi box and USB interface. It's cool to play music through the arc with no speakers. Watch this video. Bill YouTube - Led Zeppelin - Heartbreaker - solo on my midi based DRSSTC. Singing Tesla Coil

Thanks, I corrected it. I never even noticed your avatar. Is that your coil? Bill

Yes, This is my coil; but I did not build it. This one is a Dual Resonant Solid State Tesla Coil. The other type is the spark gap coil. That one produces large quantities of ozone, nitrogen oxides and intense UV radiation at the spark. The DRSSTC's are a bit more versatile as far as where you...

Yeah, I know that this is a laser forum; but who doesn't love a Tesla Coil. This one is a DRSSCT and it produces streamers that extend past 24 inches. Bill

My Laserphysics Reliant 50S-488 is also made in Salt Lake City, Utah. Wow, Salt Lake City, the Argon capital of the world. Bill

I'm originally from Old Bridge, now live in West Trenton. I spent my childhood playing with things like sodium and potassium metal and white phosphorous (very cool; but extremely dangerous substances). Doing so now would probably prompt a Homeland Security investigation. Bill

There is a free webcast hosted by Laser Focus World on 11/9 at 1:00 EDT. Their webcasts are always informative and this one will likely be interesting. Fundamentals of Photonics: Applications of High-Power Diode Lasers
 What you will learn A review of the basics of high-power diode lasers...

51; but 12 at heart. Bill

Just do a chargeback on your credit card or credit card funded paypal payment. If you paid some other way, then you might be out of luck. Bill

I bought the AL3's which are OD 3+ and bring 1 watt of 445 down to approximately 1mw. This would be adequate protection for diffuse reflections, most specular reflections and even a quick direct hit (which you should be careful enough to prevent). With the OD 7 goggles you will barely be able to...

Thanks, It's a Thorlabs Ultralight. They make good products for a reasonable cost. Here is the link. Bill http://www.thorlabs.com/NewGroupPage9.cfm?ObjectGroup_ID=1876&pn=PBG11107

I try to run mine once a month if possible for about 20 minutes. I think that this will keep my Argon happy and it's power stable for a long time. Bill

I saw a Todd Rundgren show this week and he had an incredible array of lasers. From what I could tell, they used 405, 445, 488, 532, 589, 635, and even combining for white. Here is a picture of a liquid sky effect from the show that was profound. The drummer is Prairie Prince from The Tubes...

Just a few pics of my Argon maintenance burn tonight. These pics are pretty close to the real color that you see when you look at 488nm. Incidentally 488nm is a beautiful wavelength. Bill

OK, I spoke with someone who knows about ANSI & CE standards and here is what he told me. ANSI Z80.3 and CE EN1836 are standards for SUNGLASSES. The standards for laser protection are ANSI Z87 and CE EN207. I'm going to approach WL on this; but meanwhile you should use only certified protective...

Mine have no markings whatsoever. Are anyone else's marked OD 4+ for 445? Bill

I've never actually seen them (WL) refer to the OD specs for their 445 Goggles (maybe I missed it somewhere). I know that this sounds crazy; but you know what happens when you use OD 4+ with 445nm. The beam pretty much disappears and they know that. We all want to see the beam. Maybe they tried...

Sorry, It was blurry as a small jpeg. I put it up as a pdf. Thanks