Search results

Apparently not - as goes with so many things in asia. You'll often find even things like restaurant menu's printed on very expensive material containing blatant spelling and grammar mistakes that even a non-native speaker would easily spot. But when it's in a technical document like this it...

There is a fair point in smaller laser packages becoming problematic for cooling though, especially with high power diodes. The surface area of a diode package is proportional to it's radius multiplied by it's height. This is usually a fairly small area, and you need to overcome thermal...

A beam expander is just like a telescope or binocular (or half one of the latter) so no problem to import anywhere really. It could have fallen out of the original packaging when damaged in shipping and the they still decided you to send you the rest of the content, these things sometimes...

As far is i can remember using diodes from dvd writers they have all been case-negative or case-neutral, but never case-positive as is common in 808 pump diodes. There is a bit of a catch here though: they usually have 3 pins, often with the center one connected to the case. The other two you...

This is always a compromise: in theory you can passively heatsink anything you like, but the solution would have to be extremely large. Computers generally use fans to get rid of the heat, though it is possible to do so without any fans in some cases. A laptop would not be that portable if it...

Yeah, you'd probably be looking at 60.000 pps compatible galvo's, and the problems that come with them (power use, heat generation etc). If you want to raster scan with a laser and are just experimenting a bit i'd try for a solution with a spinning mirror to do the X axis and a galvo to do the...

Men only see 16 colours as they often say. I'm not sure it's exactly that number, but it's probably close to that. Women name hundreds or colours if you give them the chance. There are some explanations for this, such as -some- women having tetrachromatic vision instead of the usual...

Yeah, i know... some things are just so iconic and etched into memory you'll never get away with using them again ;) If you showed that logo without the letters to anyone one the street (over 30 perhaps) they'll say pink floyd - that's just the way it is. Otherwise it does look nice, but...

60 lines at 15 fps may be feasible with galvo's, though it would not be easy on them and the whole system would also be pretty noisy. In a club or outdoor environment that usually isn't that big of an issue, but i you wanted to project a movie on w wall at home or something like that it'd be...

It sure is - if you mix red and green into a beam that beam may look pretty decently yellow/lime/etc when coming out of of the laser, but if you project it onto a surface 100 meters away you may find it to be a big red circle with a small green one on top of it. And that is even considering you...

It looks very pink floyd to me, but as far as realism goes, also really nice ;)

You usually put it in the 12mm* diode casing first, and then put that in a suitable heatsink. I'd start with much lower currents too, just to get a bit of a feel for the things without burning out diode after diode due to some bad thermal contact situation. As for the lenses: at these power...

Those are some nice beam colours! I'm not really sure how they got to the name bluray, but it does sound a bit better than 'purpleray' or anything like that. I'm not sure who coined the term really, but somehow it stuck. From any sources i could find it only refers to the colour of the laser...

I guess it could among laser enthusiasts that really care about beam profiles and such. Surely taming that multimode laser into producing more of a square than a line at larger distances (say 100 meters) is an attractive thing to do, and i've tried it myself with prism pairs and such. That...

5 minutes is the upper limit indeed, and that's only when it's coming straight over your head and you can see horizon to horizon. I live in a highrise that gives me almost horizon to horizon vision (depending on which directions) but even then it usually doesn't fly over near 90 degrees. I've...

If you were to scan it like a CRT tv did, that'd be extremely hard on the X galvo - it'd have to move from left to right to scan the visible line, and then back to the left in a blanking interval between lines. For a system with no moving parts like a CRT this is doable, but for a galvo getting...

I reckon it's just a grating that is spun by a motor. These things have become somewhat popular as xmas decorations, painting your entire house in sparkly dots of light with such a construction mounted in the garden (waterproofded but otherwise similar). I think you can get them at most major...

Something like -8 is very serious myopia, not many people get it that badly though luckily it can now be reasonably be corrected with contacts and such (a century ago you'd basically be blind). With milder cases like -1 or so lenses or glasses sort of change your long distance vision from SD to...

That'd probably be the reason indeed - just lack of demand. Perhaps it would be possible to build and aftermarket corrective optic cap that you could attach to the front of such a laser, but you'd have to get the exact distances and orientation right for it to work really well. The problem...

I live in a city with a fair (but not extreme) amount of light pollution and never have any problems seeing venus when it's out there with the naked eye. Jupiter was pretty visible last year as well, but that depends mostly on position since i only have windows and balconies facing south and...