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Thanks. In fairness, I shouldn't bring it with me on Batmaning practice. Yep. 2.5 W UV is somewhat achievable. The rest will be beyond spending power for a long while. Looks like this will be out of my reach until I'm a little richer. I meant what I said about anybody properly equipeed in...

Thanks for the info. Very helpful. I smashed my camera (through a silicon skin and a hardcase!) last week, but I'll upload photos as soon as I get it back next week, by which time I'll have cleaned it. The pump goes up to 100 psi, but I had suspect it would run much lower. 70 is pretty high...

Haven't had the money to do anything interesting with lasers recently, so I've concentrating on my Biolab. There's a skip I generally trawl for lab gear, and I found this awesome laser + dye pump. A quick forum search turned up nothing. It's not in great shape, but all the optics are intact...

I was about to get all smug about being a linux user and already having USB 3.0 until I remembered the hassle I have to go to in order to play DRMed Blu-Ray movies.

Good thing tobacco isn't green, or a green laser probably wouldn't work.

I wonder what happens when you shine a collimated Blu-Ray beam through a blank BR disc (HINT!).

Should we really be patronizing a store that sells dangerous lasers as safe level lasers? I mean, over-reporting milliwattage is just scammy, but under-reporting it by a whole order of magnitude is criminally irresponsible.

I can't imagine getting micrometre level precision from a consumer diode without the OEM optics. Maybe if you dremeled around the form and then used your 3.2 Watt (IR?). I'm sure you can find a dye that absorbs 808nm and is absorbed by Depron

I believe that CCDs react to IR. The filters which determine which colour will be represented in a pixel are relatively equally transparent to IR, causing it to appear white.

So, would a greenie be better? Presumably the highest frequency that doesn't charge it, discharges it fastest?

This is really bad. Imagine if some terrorist group started making 12x 405nm or 200 mw greenie builds. They could distribute them to protesters, football hooligans and general malcontents. The entire laser hobby system would be crushed.

Lasies (?) and Gentlemen, I believe we have found test subjects for the Boeing YAL-1

I'm relatively new to lasers myself, but back in my non-coherant days, I needed a strong flashlight to use during adventures. Eventually, the Gladius came out and I bought it. The difference in engineering of a gun light and a regular LED are obvious; it's got very tight tolerances and has...

It might not be false advertising; just shot in a dark room with ton of incense burning. If this firearm is to be used in hot blood (self defense/you're a cop), you should definitely use the lasers that have been tested and hardened for that application. You can easily buy a 5 mw greenie on...

I talked to my pilot next door neighbour about this. He told me that the glass the planes has a rigid outer layer and a softer inner layer embedded with a gold mesh through which they run current to prevent condensation. I wonder whether the diameter of the mesh is comparable to the wavelength...

First black hole for light created on Earth - physics-math - 14 October 2009 - New Scientist Microwave, at the moment, unfortunately. This will be cool when it works for optical frequencies.

Good day! I broke my 200mw red and am saving up for a powerful green for home lab experiments. Most of the discussions seem to favour portable lasers, so I hoped to ask those with experience of lab or industrial units. I'd like to experiment with power scaling, pulsing, water cooling and...

I believe high-frequency light destroys LSD quite enthusiastically.

Do you ever align the axes to particular stars and flash them a message? In case some guy with a 532nm sensitive telescope, distant in time and space, happens to be hanging around?

Sorry for the delay. I was away and then a little busy. When I was a kid, my dad told me a fictional story about a laser with a very complicated waveform that peaked every few centimetres, creating pockets of plasma. I always thought it was an impossible dream until I read in a news article...