Recent content by H2Oxide

Nice, assuming the optics haven't been replaced it looks like you should be good to run pretty much whatever long-wavelength dye you want. I'm not familiar with Lexel models, but if it has primary focusing optics you're going to want to keep that in mind as well, as it will determine the range...

CW dye lasers are a lot of hard work to get operational. Do you have an appropriate high-pressure circulator and nozzle? You may or may not be able to use a different dye depending on the installed optics; Ideally you'd want to use R6G and hit it with as much 532nm light as you can. Also, be...

Welcome back LC. :) Yes, optical tweezers have been around for quite some time. In fact, part of the 2018 Nobel Prize in physics was awarded to Arthur Ashkin for their invention waaaay back in 1986.

I didn't have access but I sent you a PM before the switch. I had 1000+ posts and >1y membership.

Sanwu builds nice, higher quality lasers, and they have a fantastic reputation. The laser you linked to is not a "Sanwu laser", it's a Sanwu branded generic laser. Why is Sanwu selling a laser you can find on eBay in the first place? Well, like other members have already stated, Sanwu measures...

Ah, I see. This would boil down to personal beliefs and there's a 100+ page thread on gun rights already. I do not wish to digress. I highly doubt the guy who sold it to her knew much more about it than she did. They probably DID think it was a toy. I'm not too familiar with the laser laws...

Oh hey this thread's alive again. I'm going to be away from home for several months at a time, what's the best thing I can do for my argons?

I'll agree with you that the danger lasers present is not wholly intuitive, but I fail to see how that changes anything. Just because the mother didn't recognize the danger doesn't mean it's not her fault that she endangered her child. If a parent buys a chemistry set for their child (even if...

Would you consider yourself the exception, or the rule? If I handed a child that had no experience with firearms a loaded M1911 with a broken safety and said "here, go play. Just don't look down the barrel", I would hope that someone would object. Kids are curious. They do stupid shit and that...

Parents know the risks associated with all of those things. If they deem the potential consequences too severe they WILL shelter their children from them. I mean you wouldn't let a 9 year old play with a loaded firearm, would you? My point is that the mother ASSUMED that she knew how dangerous...

I get what you're saying, and I'm not disagreeing that kids will be kids, but that's part of the reason why I think the mom is to blame. She warned him not to look down the barrel, so she was obviously aware that the laser was at least moderately dangerous, and yet she never thought to herself...

Most parents know the dangers that a stick and crayon present. Most parents DON'T know the danger a laser presents. I still blame the mom for assuming that just because she bought it at a toy store that it was "safe". You'd think that if someone's kid asks them for something they know nothing...

I meant that it wouldn't make any difference in terms of how powerful/dangerous it was. I'm not familiar enough with laws overseas to make any comment on them.

I'm not entirely certain what you're getting at here, but the fact that it is from a toy store is of little consequence. I have a whole box of green lasers identical to the one pictured in the article. Some of them were purchased online, some of them were purchased in stores. If the battery...

I doubt he'll ever regain "normal" sight. While the brain is amazingly adaptable, some things just can't be fixed.