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HGM5 might have it beat...On internal supplies that is. Probably first COTS laser with internal supply. Steve

There is more then that to it, and Bob did not ever threaten you with legal action. I did. Avery and I are talking. What Eidetic does for saving history is priceless, and he does not profit from it. Steve

Per DMCA, remove all my posts from this forum. Leave this post up per law, that you were notified to do so. Steve

Wow that is an awesome response. Even more immature. Avery has mail.

Who is your boss? Who owns the forum these days? You may not care who I am and who Bob is, but you have no sense of propriety. Steve as in major contributor Sam's Laser FAQ... The guy who has done a great deal to improve hobby and professional laser information access with a concentration on...

If you knew what Eidetic's day job is, and mine, you'd know that everything we make in new technology is based on old publications. Sometimes a hundred years old in my case. Good old Lord Rayleigh is a great physics read, he calculated much of future technology by hand in an age way before...

Sorry Paul, I'm catching up. Last two years I have been devastated between the day job collapsing post Covid and being my late mother's legal guardian. Steve

Carefully chosen dichroic mirror stacks also work... have a link... https://arxiv.org/pdf/physics/0605046 These usually come surplus from a professional coating vendor in Vermont, on Ebay, if you have NO budget... Steve

3-5% feedback is all you need, so a carefully chosen beam splitter, Ar coated one side, 3-5% Fresnel Reflection other side with a grating works for large blues and greens, shifts of 7 nanometers have been observed. If you need stable frequencies for Raman, your looking at "Littman-Metcalf"...

There are some unique simple lens with tilt, / parabolic lens combinations for up to 20 collimated lasers, then launched into a fiber if need be.. Sadly due to NDA I am not talking, but it is published/patented. Bench space required is also MEGA UGE, UGE I'm tellin ya! . ;-) Hum, Mirrored...

A warning, not all cameras are isolated from the Eye... Watch out for things like DSLR with moving shutters and direct viewing via lens . "Optically aided viewing" is very, very dangerous, and much different then using a CCD or CMOS with indirect viewing via electronics. Direct microscopes...

Hum, CXN0102 is relevent... Its newer... Not well known outside of Japan... Nice to see the whole explanation. CXN0102 is now popping up on auction sites in Japan... Laser raster video is difficult to find, let alone a hackable one. Steve

Bruce in St. Louis has the other one of those... He also has an NEC water cooled small frame argon in the same colors.

HeNe and HeCad can coexist in the same tube with multiple sets of electrodes. Neither is optimized for power or stability in a dual tube. HeNE-HeSe has also been researched. There is also color HeCad, see US patent 4,287,484 Patent 4,380,078 will give you a headache trying to determine...

I have a 8079 that is surplus to my needs. Has one blem on the cathode 0.5 mm in diameter just off center. British MOD surplus has been setting in my parts draw for years. Brits pulled them from tank vision periscopes and then placed them in controlled long term storage for spares, then...

OC means "Output Coupler" , the cavity optic which determines the spectral performance of the whole laser. This listing is just the coated optic, not a whole laser. This optic is often used to upgrade a hobby laser that may have a single line or prism tunable system to multi-line...

FOR Sale: Brand new never installed red yellow blue OC for 643 or 43 series lasers. 55$ + shipping method of your choice, for one piece, 4 available. Ion Beam Sputtered Superpolished optic made by REO. This is a "kill green" optic for biomedical use, and produces a beautiful white on a...

One of the reasons you don't see easily made hard sealed HENE lasers, is that the coating reflectivity can change when you fire the frit. So you don't coat for exactly 632.8 in some cases. Even IBS coatings can change center wavelength when firing. I have a factory gas mix 127-20 running...

PROBABLY worth trying. At least it is a common Thyratron for once. We can check the mirror coating easily enough with one of my digital CCD spectrometers. Go read the paper(s) and check the pulse width though, picoseconds through nanoseconds... Not too much fun if your eye can't see the pico...