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Well, that depends on how quickly in burns through really. If you were using those foil type eclipse glasses it may burn through in well under a second and you might not realize what's going on when focused on some other task. Then again if you get the proper thick plastic goggles it'll take...

I bet quite some of the actors walked into doors that were supposed to open automatically, and they probably still do. Automatic sliding doors are quire common in the real world nowadays, but using the on movie sets isn't always that easy since you'd still need to fit the whole mechanism into...

Obviously not - if that laser beam had a bit more power to it, it would burn a hole straight through. Those eclipse goggles are exactly built for that single purpose, but the lenses on them are often wafer thin. Thick enough not to melt under direct sunlight, but thin enough to blast through...

Yeah, that does look a bit in the range of 470 or 445, as well as tv could reproduce color at the TOS era. I'm more of TNG era guy though, and to me star trek phasers have always been sort of orange - both the handheld ones and the ones used on ships. Afaik they have been this sort of color...

Makes you wonder, did they mistype 45 as 405 or 450?

The problem with the 405 nm laser was not a lack of filtering at all, but just the wavelength being barely visible to the human eye (it's on the border of UV). Green lasers of equal power output appear a lot brighter, but could also put out IR if there is no filter there. Usually this is not...

Yeah, and also problematic if you want it to be authentic to some degree. Phasers have always been sort or orange in color in star trek, so putting a green beam in there would make it more like an enemy/alien weapon like a disruptor. I figure this may be an important difference for fans. The...

I wonder if it's a good idea putting class 4 laser beams in these things in the first place really. With a responsible owner that'd be okay, but i guess the "i want to play with it!" factor on these things is so large you'll get friends shooting them around that perhaps have limited...

It's pushed pretty far beyond specs, but looks amazing. I suppose the die temperature will cause the wavelength to rise a bit giving it a more visible color than 405 nm too. As for copper and heatsinks: they only make sense when made out of pretty pure copper. You do get alloys that look like...

Doesn't look like flux residue to me - it seems to have solid particles in it. It actually looks more like someone sprayed the thing with glue, sucked it up with a vacuum cleaner, fished it out of the bag and then sold it :D I have no idea what that crap on the driver board is, but it's...

I think the issue with red is that it's just been around so long, sort of the default color of a visible laser. The first sort of practical continuous operation lasers were red HeNe's. Those operate at a pretty visible red of 633 nm, but usually not with much power ouput (perhaps a few mW for...

I think these laser diodes will become less easy to source over time though, as their purpose is for making fast DVD writers, and that medium is losing market share quickly. For their price they have some pretty good properties though: very reliable if driven with a good driver and reasonable...

Wow, that's actually a fairly decent price for something unique like that. Rationally i can't buy it, but i think it should be in a museum really :)

Wow, those ground connections and tacked on wires are probably one of the worst bodges i have ever seen. I still wonder what all that crap on the driver board is... did you take these photo's after some component exploded on there or are they actually made like this?!

The choice of putting 'fire' was unfortunate indeed, but ultrafire cells were a pretty good deal in the past. While it's not a household brand like panasonic, there are plenty of -fake- ultrafire cells on the market, even 18650 size tubes with only a tiny little cell in the middle and filled...

I doubt he would be caught up in any of that - afaik he mostly lives in jakarta which hasn't been more severely flooded that normal, but perhaps he's elsewhere in the country. One thing in indonesia is that communication networks cut out quite often, especially when there is a power cut...

700 mAh for a 16340 sized cell is not that bad i think. I'm sure there are vendors that claim much higher numbers, but it's not that realistic. The actual size for the cell in a 16340 cell is about 1/3rd of that in a 18650 (if you account for room taken up by the cell wall...

I'd agree that the shorter wavelengths have the most burning potential, even fluorescence causes heating of the target and potentially setting it on fire. If you want to focus your beam down to a small spot to get the maximum power density possible a single mode diode would be the best choice...

Well yeah, you could replace a filament in a broken light bulb, but that'd be very difficult to to in both getting the replacement material as well as the required equipment, skill required, and very low cost of replacement. With this laser pointer it's not that different, except you will not...

Hehe, and old school grenade with the pin pulled isn't even that big a problem - you can just put the pin back in or tape over the lever... it's actually the lever springing up that sets it off :) It would have been funny if one of those goofballs in the video actually got his pants set on fire...