Focusing a laser(blue/green handheld burning laser) through a motorized optical lense (a camera lens basically); to...

Focusing a laser(blue/green handheld burning laser) through a motorized optical lense (a camera lens basically); to defuse and recross the strongest point, over and over very quickly (a blade). Put it in a pipe =lightsaber discuss?

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edit:I didn't draw this, pic semi related, cause rotj young luke is best luke.

Go sperg out somewhere else.

bump

yeah
won't work

when you're focusing on one spot for 1% of the time, the effective energy in that exact point equals 1% of the radiated power
given that a hand held laser barely pops a dark balloon in a few seconds your scanner will be safe to the touch when 10cm long and even be eye safe when longer

learn the difference between "defuse" and "diffuse" you semiliterate prick

scanner?

my apologies

so id have to have fantasy nuclear power, that kills me with rads? damn it, would it still Look like a light saber?

op proposes a device that focuses the laser on a spot and moves the focus fast, scanning between two endpoints, creating a spot of high energy concentration moving over a given length, hence creating a laser blade

no it won't look like a saber because light doesn't stop
if the air has particles (smoke/steam/dust) you'll see a stream up until the energy is dispersed
a 5mw china green laser shines about 10km easily

damn it

Thank you /b i appreciate the help

problem is not powering it, proble is mainly having a beam generator that is small and powerful

steel cutting lasers are like 2m3 of room for the generator alone
plus focusing/beam former, power, gas generator/tank, that's something that fits on a truck but not in a backpack

there a video of some space man handling a gun lasering thin sheet metal
that's just the focusing unit, laser is provided via glass fiber
cuts metal sheet of 3mm in close range
gun's like a minigun in size and weight

Interesting, and most unfortunate. This is very helpful although disheartening

Because OP is a faggot who wants his nerdy friend to discuss:

There are 3 challenges to making a functional lightsaber per the movies, 1: creating a laser powerful enough to sever human limbs with a fraction of a second's exposure, 2: causing that laser to have a definitive and abrupt end point, and 3: making it and it's power source small enough to be handheld. Sources of dubious canonicity even before Disney fucked everything up declare that the laser is magnetically turned back into the hilt, creating an effect similar to a water fountain under gravity, which is then used to recharge the lightsaber. Any engineers in here willing to spend the time breaking down how much bullshit that entails?

you sound like you had a dream and i killed it
sorry to make you sad

"life sucks and then you die" I was once told. Don't be sorry, please.

it's sci-fi

think people from 1930 see a modern smartphone
- live video
- a camera in color
- music
- can replay recorded video, hours of it without changing film cassettes or developing it
- millions of photos
- available via touch or even voice control
- can talk to almost any human on this planet, tens of thousands miles away, instantly
- even with live video
- also, porn and cat vids

you'd be a magician showing it to someone pre 1960
think what is possible in 2100
i won't say we have lightsabers but i won't say we don't have them, either

fair enough

Perhaps "bullshit" was the wrong word. What I mean is that the big challenge is figuring out how to make a laser stop, which as I understand, is something that we don't have the foggiest on yet.

I figured that was an actual question. Are there any here?

maybe it's impossible to make light stop
but maybe the beam is just the result of something that can be stopped, e.g. via interference
and the beam we see is just the ultra heated atmosphere from the sheer power needed to cut through limbs
the description from the old movies was when tvs barely had color, remember

maybe
?

The term "laser" itself was never used in the original films, the only time it was used was Anakin's statement of "laser sword" in Phantom Menace. The cultural consciousness is very solidly on the lightsaber being a laser, but I suppose there could be alternatives. My copy of Physics of the Impossible appears to have evaded me, but I seem to recall it describing that under vacuum, running plasma through a tube of perforated metal creates a glow and cutting effect resembling that of a lightsaber. We know that the Star Wars universe has force fields, so it could arguably be that the lightsaber works by channeling plasma through the hilt and using a forcefield to contain it, but that raises questions as to the purpose of the focusing crystals that are described as the most important and most challenging part of constructing a lightsaber.

well it's something to think about I suppose.

some energy, like a uranium crystal or some shit?

...

...

Uranium is a metal, I don't think it crystallizes. But either way, every excuse for a technical manual that exists swears up and down that a laser is run through the crystal(s, 1 to 3) to focus and amplify the beam, and that hand-cutting and -assembling them in just the right way is key to keeping the whole damned thing from blowing up in your hand (the Shadows of the Empire novel goes into some detail on the construction process of a lightsaber). Perhaps then the laser is used to superheat gas and convert it into plasma?

And it wouldn't be a power source anyway, because lightsabers have been well established in the Expanded Universe to utilize a power pack (battery), similar to that of a blaster.

Uranium is a transition metal, for the fucking chemist that's going to point that out.

(Fuck me, this website makes it so easy to run off with a post that doesn't adequately explain your thoughts.)

did mean that literally... like just because its something we think of that has massive energy out put. Crystal being the object at hand.

...

disregarding the size i think this is the only way to actually have something like a laser "sword"

Maybe you could have an array of focusing optics similar to a DLP chip. Use multiple led sources for power and have regions of the chip engineered for each source. The mirrors would need to change focus at an extremely high frequency, theoretically matching the emissions speed of the photons of the laser. Of course this is highly expensive and improbable but still fun to think about.

this is wonderful.
youtube.com/watch?v=gIoYjsKWLmA&list=RD7DtVBD6W5_A&index=11