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3D printed mirror array

github.com

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Re: 3D printed mirror array

#61

Post by thih9 »

harvie wrote: post #7

This is future of the street art. Mount it using liquid nails to some place that is hard to access and point it somewhere where lots of people will see it during rush hour. Eg.: You can install it in such way that parliament building will get defaced every day during lunch hours by mounting on near building or tall lamp post. Or maybe put it on your own roof, that way nobody can remove it :-)

> put it on your own roof, that way nobody can remove it

I imagine you’d need a permission; just like you’d have to get one if you wanted to use a projector and project something onto parliament. (TINLA)

Re: 3D printed mirror array

#62

Post by Turing_Machine »

jacquesm wrote: post #47
jhgb wrote: post #41

I'm wondering if a similar effect couldn't be done using a continuous surface and just silvering it. I saw something similar done with refraction but can't remember the URL now. 3D printers definitely have higher resolution than mirrors of this size.

If you're willing to spend a lot of money on silver then probably yes. After all the height differences are substantial and silver isn't cheap. 3D printers resolution sucks in comparison to the mirrors, I'm not sure what you mean by that.

Aluminizing it would be way cheaper than silver.

For that matter, you could probably glue down pieces of aluminized mylar rather than using mirrors, since you all you need is a spot of light, not a full-blown mirror image. Aluminized mylar is pretty cheap!

Re: 3D printed mirror array

#63

Post by Turing_Machine »

jacquesm wrote: post #50
TheRealNGenius wrote: post #42

Earlier quoted context omitted.

I mean, I don't think the parent post was that substantive either. There is nothing in this submission that necessitates roping in the topic of the metaverse. They could have just left it as they found this tech interesting.

If you can't say something nice about a project like this then say nothing at all. To belittle it is classless.

Agreed. I really, really hate it when someone shares something cool they've made and HN people dump on it.

I'm not saying that HN has to be all mindless cheerleading, but non-constructive criticism is not helpful to anyone (except the critic's ego, maybe).

Re: 3D printed mirror array

#66

Post by Mountain_Skies »

thih9 wrote: post #61
harvie wrote: post #7

This is future of the street art. Mount it using liquid nails to some place that is hard to access and point it somewhere where lots of people will see it during rush hour. Eg.: You can install it in such way that parliament building will get defaced every day during lunch hours by mounting on near building or tall lamp post. Or maybe put it on your own roof, that way nobody can remove it :-)

> put it on your own roof, that way nobody can remove it I imagine you’d need a permission; just like you’d have to get one if you wanted to use a projector and project something onto parliament. (TINLA)

One of my friends used to live across the street from a federal courthouse. He tried projecting a movie from his window onto a blank wall of the courthouse. Half an hour later several LEOs were at his door asking him "politely but firmly" to turn off the projector and to never do it again.

Re: 3D printed mirror array

#67

Post by codazoda »

jacquesm wrote: post #30

What an absolutely amazing piece of work, and even more incredible that it worked the first time. If I had to do something like that it would take me at least three tries to get it to work and quite possibly more than three. Math, 3D printing, love, what's not to like :) And congratulations!

Even simple stuff takes me multiple tries. I don’t know how any engineer gets a design right the first time. I can build it in a 3D design app, look all around it, and STILL see something in the prototype that was not obvious in the design.

Re: 3D printed mirror array

#69

Post by jacquesm »

codazoda wrote: post #67
jacquesm wrote: post #30

What an absolutely amazing piece of work, and even more incredible that it worked the first time. If I had to do something like that it would take me at least three tries to get it to work and quite possibly more than three. Math, 3D printing, love, what's not to like :) And congratulations!

Even simple stuff takes me multiple tries. I don’t know how any engineer gets a design right the first time. I can build it in a 3D design app, look all around it, and STILL see something in the prototype that was not obvious in the design.

I just built something I had to get right on the first try because messing it up would be more than a little dangerous. Endless fitting and testing and re-thinking before committing to building it. A little cheating was involved, I built a 1/17th scale test setup to ensure that all the electrical bits would work.

Re: 3D printed mirror array

#70

Post by makeitdouble »

akomtu wrote: post #20

This idea will have many unexpected applications. For example difficult to remove signs projected to flat surfaces.

An application close to this idea: IKEA arrow signs projected on the floor.

They need no painting, floor needs no protection or treatment and they won’t disappear until the light is off.

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