Can Magnets Stop Vibrations? Magnetic Levitation Laser Table - Holograms 1 

It's not an office. It's an 150 year old building made largely of wood and brick. The whole building feels like it's shaking when people walk around above you, and there's a carpentry shop on the other side of the wall running big machines and hitting things with hammers. Also a dozen people walking around in the lab itself or playing beat saber in the other room jumping around. So that'll give some perspective of how good these actually are. The fact that I could get a relatively consistent pattern minus a bit of shake with all that in the background is a testament to how well the feet work.

@@thethoughtemporium Thank you, I figured there were some factors I was missing.

wold have been cool to see the setup run on the ground, to see how much of a difference the table made.

For comparison, I've worked on one of the big expensive tables when I was at University, and we could still see the vibrations from people walking in the room. It goes to show just how sensitive the optics are to changes in their alignment! Considering how much cheaper and easier to make this is, it did it's job alright. I love seeing other people's home labs and the innovation in making things work with what's on hand. With scientific equipment theres a sense of diminishing returns where you really have to pay out the nose for that last 10, 5 or 1 %. Of course, if that's your business, well, that's what you've got to pay.

Heavy weights are harder to move. He didn't use a heavy table here, he just used acrylic. He said it was only temporary until he got something heavier. I think he mentioned using steel.

I am now very interested in that and I am wondering if I could ask some favors in and use the lab at university to make such a mold.... We will see, but probably not.

@@genijable Good luck!

Yeah

You really need to check out the channel, tech ingredients

i make edibles with weed leaf holograms on them,mushrooms too

That's what's kind of funny too, since all things are quantum mechanical in nature.

Meh, you can demonstrate gravity for free.. And also build interferometer from a laser pointer and a piece of glass, that's like $20 at most.

_Meanwhile, in the Double Slit Experiment..._

A couple suggestions for future experiments: different types of foam. Also, there's an automotive product which I know as 'dynamat' which is used for sound deadening. It's basically a dense tile that you melt onto sheet metal with a heat gun. You could try applying that to the underside of your table.

Marshall Horton I’m still convinced nilered and styropyro are the same person with a voice changer and a step-in actor.

This Old Tonys has all the humor but less science.

May be mounting the setup on four more rods that are perpendicular to this entire setup should do better job theoretically.

AHAHAHA LOVE IT. Gotta say doing things that have a big budget and lot's of freedom to spend money is always fun.

We recently ordered an optical table at work. the reason? It had the right screw hole pattern...

Yeahh! I hope the spifer silk project will give some huge process in the near future :)

The most likes ive ever gotten in a comment

This is an excellent idea. You should do it yourself and become a RU-vidr and make money doing cool things.

Sounds great. Wetting the mold for the silicone could be a problem though at these fine scales. You'd get effects similar to aerogel shrinking due to surface tension pulling the bubbles/cavities tight if in a liquid state. Maybe you could replace the material of one of the parts (mold and it's feeding plate) with a liquid you can freeze out/freeze dry or something. Like, let the mold eat something you can later dissolve with acetone, and freeze everything while dissolving the plate. Then you can prevent the mycelium from deforming now that the bulk material is gone. Or, for more extreme effects, use a hydrocarbon base you later dissolve with cryogenic liquid that you can vaporize again without thawing the mycelium. Like, with liquid propane/butane. You might even replace it with something you can use different phase change boundaries w.r.t. water with to put it in place of the base, freeze it, and use positive / negative pressure to liquify the water (and thus the mycelium cells, which should be dead due to tiny ice crystals), remove the mycelium's remains with a corrosive liquid (hydrochloric acid/sodium hydroxide are pretty persuasive to cells), and fill the voids with silicone you harden without thawing the base (further pressure and higher temperature or photocatalytic polymerization seem viable) .

this would actually do the exact opposite - it would help vibrations to transfer through the magnet into the table.

@@KohuGaly it would transmit some low frequency vibrations like seismic waves but damping higher frequency more like footsteps. depending on what is most damped already this may be worth it

​@@sudazima are you sure? Let's say the pipe is connected to the ground and the magnet is levitating the table. When ground shakes, the pipe shakes and drags the magnet with it. It effectively makes the connection between the ground and table stiffer. From what I understand, the goal is for the table to not move with the ground, but float stationary to it. the pipe achieves the exact opposite. It fastens the table relative to the ground, so they move in unison.

Yeah, I was wondering, is there any way at all to utilize Eddy currents for further dampening?

Actually, i think it doesn't matter if the whole table oscillates up and down as long as all light sources, reflectors, lenses and targets stay still relative to one another. If everything is firmly attached to the table, what must be avoided is high frequency vibrations travelling through the table material.

Indeed! Why didnt he test that? Good you bring it up!

Thanks!

lol show me now lets get rich ;0

I'm not even kidding these were my exact thoughts before seeing this comment.

X-ray plates are very fine-grained emulsion, and as a consequence, very low ISO speed, like 25. And they may be getting hard to find now, since Digital X-rays have become rather common. There is also coated paper with the same kind of emulsion and resolution. Both kinds are/were available on long, wide rolls.

Also, Nd:YAG should be a lot better. Maybe you can find tripled Nd:YAG if you need something for UV-resin. But I can't recommended diodes for interferometric usage, unless you really want it restricted to a couple dozen wavelengths coherent length.

@@namibjDerEchte Nowadays semiconductor lasers can have longer coherent length than HeNe lasers. (several meters).

Joe Duke have you used filtered arc lamps?