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I've had hands on and "hands in" experience on a large KrF. At 248nm, lenses AR coated and mirrors AT coated for it still show 'some' fluorescence. The 800 mJ pulses ensures any imperfections on the optic, and any dopants in the optic break down or fluoresce with a deep violet color. There's a...

For the current shunt, I recommend using a couple of Vishay SR5s in parallel. They each handle up to 5W and are not very inductive since its just a metal strip. I use them quite a bit. http://www.vishay.com/docs/31067/sr.pdf Its good you've got the feedback loop in there, and some protection...

Hmm.... Can't figure out why there's 19V on the gate. That's quite a bit. That nearly to the point of literally punching through the oxide layer at the gate, and ruining the device. With a different MOSFET I'm certain you won't need so much voltage.

Well, lets start with the FET then. Assuming you're using an N-type MOS device, we'll need to start with a device with a threshold voltage which is fairly low -> ~1V on Vgs. The op amp must be able to hold this at minimum at the gate... blah blah blah Now we have to consider that so long as...

On a parametric scale, it comes down to this. It is well documented. Ask any of the display/projection guys.

Only trouble is, if they find out your lab is government funded, they will ping you with a doubled price because they know the government is footing the bill. Companies do it to NASA all the time.... :(

Re: FS: Gas From The Cellar I hope isn't a bad thing. I find myself more interested in the anemometer more than anything else. Such a good price!

Yep. There are almost more high current pulsed designs out there than there are for CW. But for most of us here, a pulsed output with high peak power is generally not noticeable compared to a stable CW beam. With pulsed operation - there is the hard-to-ignore component of your laser becoming...

This is typical for any non-mass produced piece of photonic equipment. And depending on the lab, and your research grants, $8k could be spare change to you. Trust me - it gets much much worse than this very quickly.

Hey! Neat to see lasers getting a positive rep in the media! Thanks Drake! Nice work there!

Classes tend to be math "intensive". Rigor almost implies no one wants to do it. :p Lab work tends to be fiddling with software until you think it works again, and then having to adjust hardware likewise, only to find that your software screwed things up again. Always a battle.

Intel Core i7-4770 3.4 GHz Quad Big ass heatsink and fan Asus Maximus VI Hero ATx LGA1150 Corsair XMS3 16GB (2 x 8GB) DDR3-1600 Samsung 840 Pro Series 128GB 2.5" SSD Western Digital Caviar Blue 1TB 3.5" 7200RPM Asus GeForce GT 640 2GB 5x Courgar Turbine case fans +wireless, optical drive...

Me too! People | Laser-Assisted Nano Engineering Lab (LANE) <-- I'm the undergrad I'm excited for next semester as well! ELEC 480/880: Introduction to Lasers and Laser Applications | University of Nebraska-Lincoln Undergraduate Bulletin | University of Nebraska-Lincoln Its going to be a...

Well. We can consider if each of your PCBs will be the same thickness or not. I'm assuming your design illuminates the board from up top so its the PCBs top surface that needs to be a very constant distance away from the diode to maintain such a tight tolerance. Next, you can consider that...

What kind of things do you plan on printing?

I didn't use one.. I don't need a paper to tell me this when I've personally asked quite a few assholes about why their being assholes. It happens on a personal level however - as an intentional effort to try and connect with them. I don't just walk up to them an ask "Hey, why are you kind of an...

Plus there are some noise related advantages to using smd resistors over carbon comps. As long as the parts for the design are well specified, linked to, highly available and very accessible, something like a kit would not even be necessary. Also, might be neat to use uC sockets instead, so...

Or rather - learn to show them love so their error can be detected and possibly corrected. The latter is indeed a choice made- assholiness not a state which just 'happens' to someone. "Dealing" with them is not explicitly for your own good or self preservation. Doing this will likely turn you...

Just remember that everyone starts somewhere. No blame can be place for that starting place - but it could be placed on those that refuse to grow from there. Does it justify being rude to them? Are you assuming that it is always better to be more intelligent than someone else? Its simply not...

Yes please. :D For all.