Hi everyone, welcome to the Hack Chat. I'm not sure I saw Seb login yet - are you here, Seb?
Oooh, it's THAT kind of laser artistry
Yeah those lasercubes are neat
I laser cut leather phone cases and stuff? ^^
they are indeed, ive had em since prototype
and its predecessor of course
Hi Seb! Welcome!
Hi everyone! Sorry I'm a bit late, I was in the wrong place 😊
No worries, welcome to the Hack CHat Seb. And thanks everyone for turning out today to learn a little about Seb's work with lasers.
Can you start us off with a little about yourself, Seb?
Yeah sure! I'm a maker, artist, coder, laserist, and I specialise in large outdoor interactive installations. I've been working with lasers since 2013, and I've written my own laser control library. My plan this year was to replace fireworks with LED light sticks and lasers, that's been somewhat scuppered by the current situation so I've now been working on a couple of 3D printed medical PPE projects. AMA, I guess? 😊
Yeah, we've been doing the medical PPE side of things lately too. What kind of output are you looking at for these lasers?
I generally use multiple 12W RGB lasers but I've used a couple of 30W previously. I have built up quite a collection!
what do u think about using someting like the tap strap 2 keyboard to control stuff live
*googles tap strap 2 keyboard*
Ooh, so you're actually in the range our beam combiners can get our solid state lasers up to. Sweet.
I was really curious if you could do any of these things with 8-14W solid state, sounds like yes
oh looks like a fun controller - would definitely be fun to play with that
what's a tap strap 2?
think nintendo glove for the nes but cooler
Oh, air keyboard
it looks a bit like the MIMU glove
What kind of safety precautions do you have to take when working with lasers in a public display?
do not point in peoples faces
In my experience the laser side has been the easy side. Deflecting the laser in a controlled manner is the hard part. What do you use? Galvos, servos, steppers?
Have you ever used MEMS scanning mirrors rather than galvos out of interest?
That's always a good start :)-
Do not look into laser with remaining eye
MEMS scanners dont get used for laser display (as in show) applications too often because they can't take the required power density.
literally burns the optics
@riley.august You have a remaining eye? I'm jealous :)
@Cerrid - good question, I generally don't point lasers at humans, if you want to do that there's a whole bunch of extra gear and paperwork that you have to do. The main thing is making sure that the laser beam can't go anywhere you don't want it to. First you limit it in code, then you limit it physically where possible, using metal foil tape. You also have to look out for reflective surfaces, glitter balls etc. There is also an emergency stop button that breaks a special connection...
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