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These boxes were the only enclosures I could find that were big enough. I much would have preferred an aluminum extruded enclosure or an old show laser enclosure over a steel sheet metal one, but I made it work. I actually had to shave an inch of extra material off the optical table to make it fit!...

Thanks! I'm currently using LaserShowGen and a Helios Laser DAC. It would be cool to try an FB4 and QuickShow/Beyond, but that's a bit out of my price range currently haha.

Thanks! Believe it or not, it only costed me $250 in parts! I had access to a mill so the machining only cost me my time and $20 for aluminum stock.

Thanks for the info Steve. FIXED!

Yes sir, I just re-read my John Bell Engineering, Inc 2716 EPROM Programmer manual (to fact check myself and my old recollections) which states that any memory location within the 2K data range to be written that is not to be overwritten should be filled with FF. So it was possible to only write...

It's important to remember it was a long time ago. The DOG programing was done real close to the bare metal. The first computer at Laser Images was a six board wire wrapped masters thesis project. Having some junk in the unaddressed space wasn't because they put it there - they just didn't take it...

Great investigative sleuthing, Roj! It cools to see the image pieces fall into their choreographed place. Greg, when I was referring to CVs, I was extrapolating the use of 8-bit values being used as inputs to the DOGN 8-bit DACs for "image offset control voltages". To me a CV is a very broad...

lasermaster1977, or anyone else interested, I suggest anything you want to do involving the bela just ask me first, that will probably save you time. I watched those videos and asked questions on the forum so you won't have to. As time permits, I'll look into what is needed to get those sensors you...

Neat! I keep forgetting to search for numbers on youtube before diving into restoration. I have that XYZ number from the Rush show from a 1/4" reel. The underlying choreography in that video looks similar or the same as what I have, but I think what is going on is that an image generator called the...

You're welcome! Hey, I found that bottle graphic, that I thought was from 'Message in the Bottle.' 😎

Thanks Roj. Here is the Rainbow Cadenza image plot with the missing end segment of 'NZA' restored to its rightful place. For some odd reason this end segment was at the beginning of one 2K ROM that immediately preceded a string of ASCII symbol characters shown previously and here again:

Publication != Learning for some large subset of Publication. LoL... been there... However you need those seven pubs if you want to teach. :-) Steve

Lh doesn't have as massive an overhead and far less stockholders. See US 9,008,144B2 STEVE.

I'm well aware that buy here is almost certainly cheaper than build, but it's also meant to be a learning exercise.

Lighthouse Photonics Sprout, by the designers of Verdi, might be cheaper option. Just a plug for Lighthouse. They really took care of my former employer. That and their patent is an interesting read. What Eric says in the video about a homogenous pump is worth listening to. Steve

My current plan is to use a set of 808nm MM diodes, knife edged along fast axis to get beam with roughly similar M^2 in both axis (I convinietly aquired FAC diodes with M^2 of 1.3 x 15 with divergence in similar ratios) and possibly PBS combined if I need more power. I know that pumping from both...

HERE: I used to know him personally. I had a bit of hand in helping him make some design choices on this beast. https://youtu.be/Pp9hliLJjg4?si=vuP17YP9ZEV0Rf7H He later switched to a "capped" crystal with undoped ends. That reduces the lensing even more. STEVE

The longitudinal modes do frequency mixing / beating against each other. The mixing products cause problems in the doubler, especially if there is excess nonlinearity. I'm going from memory as these were all 1990s problems for me. I had a 150 watt lamp pumped laser that I wanted to convert to...

ScienceDirect.com https://www.sciencedirect.com › vitt... Vittorio C. Magni Not all his papers are listed there. THE one you want is actually a lamp pumped YAG paper. The methodology of Spectra Physics old model Millennia V is what you want. First of the tight 532s with good mode quality...

Various pics SELEM 17 2024

Belly up to the bar...

Right, now that I think about it Kerr lens modelocking should be sensitive to amplitude and traverse mode fluctuations as they change gain distribution, but how longnitudal mode noise influences it? Just to clarify what sources you are referring to: Tony Siegman's book is "Lasers"? I read it...

Be very careful that you do not confuse longitudinal and transverse modes. Yes, in a highly tunable femto ring ti:saph, amplitude and both transvers and longnitudal mode noise in the pump can cause Issues when Kerr Lens Modelocking. I spent a good three semesters with Mira and Chameleon at one...

Be very careful that you do not confuse longitudinal and transverse modes. Yes, in a highly tunable femto ring ti:saph, amplitude and both transvers and longnitudal mode noise in the pump can cause Issues when Kerr Lens Modelocking. I spent a good three semesters with Mira and Chameleon at one...

Single mode is important for many things, but not for pumping other DPSS lasers (OPSLs pumping TI:sapphire are often multimode) so single mode control isn't crucial everywhere. Can you elaborate on the green problem in this context (I read the article about someone trying to build DPSS but can't...

SELEM 2025 drone racing is a go!! As Adam said earlier, we looked over the field next to the venue and determined that it was sufficient to bring back drone racing next year. A few people brought drones to fly this year making me wish I brought mine. One that stood out was the DJI FPV that...